Download Mitsubishi SRK20ZJ-S Specifications

DRAFT
Manual No.'09•SRK-DB-087D
DATA BOOK
INVERTER WALL MOUNTED TYPE
ROOM AIR-CONDITIONERS
(Split system, air to air heat pump type)
SRK20ZJ-S
25ZJ-S
35ZJ-S
'09•SRK-DB-087D
CONTENTS
1 SPECIFICATIONS ....................................................................................2
2 EXTERIOR DIMENSIONS ........................................................................5
3 ELECTRICAL WIRING .............................................................................7
4 NOISE LEVEL ..........................................................................................9
5 PIPING SYSTEM ....................................................................................12
6 APPLICATION DATA .............................................................................13
(1) Installation of indoor unit ................................................................13
(2) Installation of outdoor unit ..............................................................17
7 RANGE OF USAGE & LIMITATIONS ....................................................24
8 CAPACITY TABLES...............................................................................26
REFERENCE
1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ..........27
2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT .......39
How to read the model name
Example :
SR
K 20 Z
J-S
Series code
Inverter type
Product capacity
K:Indoor unit (Wall mounted type)
C:Outdoor unit
Split type room air-conditioner
-
-
'09•SRK-DB-087D
1 SPECIFICATIONS
Adapted to RoHS directive
SRK20ZJ-S
Model
Item
Indoor unit
Cooling capacity (1)
Heating capacity (1)
Power supply
Power
consumption
Operation
data (1)
Running
current
Inrush current
W
W
Cooling
Heating
Cooling
Heating
Cooling
Heating
Sound level
Cooling
Power level
Noise
level
Sound level
Heating
Power level
Exterior dimensions (Height x Width x Depth)
A
COP
dB (A)
dB
dB (A)
dB
mm
kg
Net weight
Compressor type & Q'ty
Motor (Starting method)
Refrigerant oil
Refrigerant
Refrigerant (3)
equipment
Heat exchanger
Refrigerant control
Deice control
Fan type & Q'ty
Motor
Colling
Air handling
Air flow
equipment
Heating
Fresh air intake
Air filter, Quality / Quantity
Shock & vibration absorber
Electric heater
Operation switch
Operation
Room temperature control
control
Operation Display
kW
kg
W
CMM
Safety devices
Refrigerant piping size ( O.D )
connecting method
Installation
data
Attached length of piping
mm
Fine snow
Stucco white
( 8.0Y 9.3/0.1 ) near equivalent
( 4.2Y 7.5/1.1 ) near equivalent
9.5
—
—
32
RM-B5077MDE1 ( Rotary type ) x 1
0.75 ( Line starting )
0.35 ( DIAMOND FREEZE MA68 )
R410A 0.75 ( Pre-Charged up to the piping length of 15m )
Louver fins & inner grooved tubing
M fins & inner grooved tubing
Capillary tubes + Electronic expansion valve
Microcomputer control
Tangential fan x 1
Propeller fan x 1
38
24
Hi: 7.8 Me: 5.6 Lo: 4.8
29.5
Hi: 9.8 Me: 6.3 Lo: 5.0
25.6
Not possible
—
Polypropylene net ( washable ) x 2
—
—
Cushion rubber ( for compressor )
—
—
Wireless-Remote control
—
Microcomputer thermostat
—
RUN: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Liquid line: φ6.35 ( 1/4" )
Gas line: φ9.52 ( 3/8" )
Flare connecting
Liquid line : 0.53
m
Gas Line : 0.40
Insulation for piping
Refrigerant line (one way )length
Vertical height difference between
outdoor unit and indoor unit
Drain hose
Power cable
Recommended breaker size
Size x Core numbe
Connection wiring
Connecting method
Accessories (included)
Optional parts
SRC20ZJ-S
Outdoor unit
2000 (1000 (Min.) ~ 2700 (Max.))
2700 (1200 (Min.) ~ 3900 (Max.))
1 Phase, 220 ~ 240 V, 50Hz
0.44 (0.21 ~ 0.77)
0.62 (0.27 ~ 1.38)
2.5 / 2.4 / 2.3 (220/ 230/ 240 V)
3.2 / 3.1 / 3.0 (220/ 230/ 240 V)
3.2 / 3.1 / 3.0 (220/ 230/ 240 V)
4.55
4.35
Hi: 33 Me: 27 Lo: 21
47
49
59
Hi: 36 Me: 31 Lo: 24
46
52
58
294×798×229
540×780(+62)×290
kW
Exterior appearance
( Munsell color )
SRK20ZJ-S
—
Necessary ( Both sides ), independent
Max.15
Max.10 ( Outdoor unit is higher )
m
Max.10 ( Outdoor unit is lower )
Connectable ( VP 16 )
A
—
—
16
1.5mm2 x 4 cores ( Including earth cable )
Terminal block ( Screw fixing type )
Mounting kit, Clean filter ( Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1 )
Interface kit ( SC-BIKN-E )
Note (1) The data are measured at the following conditions.
Outdoor air temperature
Item Indoor air temperature
Operation
DB
WB
DB
WB
Cooling
27ºC
19ºC
35ºC
24ºC
Heating
20ºC
—
7ºC
6ºC
The pipe length is 7.5m.
Standards
ISO-T1 , JIS C 9612
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) The operation data are applied to the 220/230/240V districts respectively.
(4) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.
(Purging is not required even for the short piping.)
RWA000Z225 a
-
-
'09•SRK-DB-087D
Adapted to RoHS directive
SRK25ZJ-S
Model
Item
Indoor unit
Cooling capacity (1)
Heating capacity (1)
Power supply
W
W
Power
consumption
Running
current
Cooling
Heating
Cooling
Heating
Cooling
Heating
Sound level
Cooling
Power level
Noise
level
Sound level
Heating
Power level
Exterior dimensions (Height x Width x Depth)
kW
A
COP
dB (A)
dB
dB (A)
dB
mm
Exterior appearance
( Munsell color )
kg
Net weight
Compressor type & Q'ty
Motor (Starting method)
Refrigerant oil
Refrigerant
Refrigerant (3)
equipment
Heat exchanger
Refrigerant control
Deice control
Fan type & Q'ty
Motor
Colling
Air handling
Air flow
equipment
Heating
Fresh air intake
Air filter, Quality / Quantity
Shock & vibration absorber
Electric heater
Operation switch
Operation
Room temperature control
control
Operation Display
Installation
data
Attached length of piping
Fine snow
Stucco white
( 8.0Y 9.3/0.1 ) near equivalent
( 4.2Y 7.5/1.1 ) near equivalent
9.5
—
—
32
RM-B5077MDE1 ( Rotary type ) x 1
0.75 ( Line starting )
0.35 ( DIAMOND FREEZE MA68 )
R410A 0.75 (Pre-Charged up to the piping length of 15m)
Louver fins & inner grooved tubing
M fins & inner grooved tubing
Capillary tubes + Electronic expansion valve
Microcomputer control
Tangential fan x 1
Propeller fan x 1
38
24
Hi: 7.9 Me: 6.0 Lo: 5.0
32.1
Hi: 10.6 Me: 6.5 Lo: 5.1
25.6
Not possible
—
Polypropylene net ( washable ) x 2
—
—
Cushion rubber ( for compressor )
—
—
Wireless-Remote control
—
Microcomputer thermostat
—
RUN: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Liquid line: φ6.35 ( 1/4" )
Gas line: φ9.52 ( 3/8" )
Flare connecting
kW
kg
W
CMM
Safety devices
Refrigerant piping size ( O.D )
connecting method
mm
Liquid line : 0.53
m
Gas Line : 0.40
Insulation for piping
Refrigerant line (one way )length
Vertical height difference between
outdoor unit and indoor unit
Drain hose
Power cable
Recommended breaker size
Size x Core numbe
Connection wiring
Connecting method
Accessories (included)
Optional parts
Operation
Cooling
Heating
—
Necessary ( Both sides ), independent
Max.15
Max.10 ( Outdoor unit is higher )
m
Max.10 ( Outdoor unit is lower )
Connectable ( VP 16 )
—
—
16
1.5mm2 x 4 cores ( Including earth cable )
Terminal block ( Screw fixing type )
Mounting kit, Clean filter ( Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1 )
Interface kit ( SC-BIKN-E )
A
Note (1) The data are measured at the following conditions.
Item
SRC25ZJ-S
Outdoor unit
2500 (1000 (Min.) ~ 2900 (Max.))
3200 (1200 (Min.) ~ 4200 (Max.))
1 Phase, 220 ~ 240 V, 50Hz
0.62 (0.21 ~ 0.88)
0.80 (0.27 ~ 1.36)
3.2 / 3.1 / 3.0 (220/ 230/ 240 V)
4.0 / 3.8 / 3.7 (220/ 230/ 240 V)
4.0 / 3.8 / 3.7 (220/ 230/ 240 V)
4.03
4.00
Hi: 34 Me: 28 Lo: 21
48
50
60
Hi: 39 Me: 31 Lo: 24
49
55
61
294×798×229
540×780(+62)×290
Inrush current
Operation
data (1)
SRK25ZJ-S
Indoor air temperature
DB
WB
27ºC
19ºC
20ºC
—
The pipe length is 7.5m.
Outdoor air temperature
DB
WB
35ºC
24ºC
7ºC
6ºC
Standards
ISO-T1 , JIS C 9612
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) The operation data are applied to the 220/230/240V districts respectively.
(4) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.
(Purging is not required even for the short piping.)
RWA000Z225 a
-
-
'09•SRK-DB-087D
Adapted to RoHS directive
SRK35ZJ-S
Model
Item
Indoor unit
Cooling capacity (1)
Heating capacity (1)
Power supply
W
W
Power
consumption
Running
current
Cooling
Heating
Cooling
Heating
Cooling
Heating
Sound level
Cooling
Power level
Noise
level
Sound level
Heating
Power level
Exterior dimensions (Height x Width x Depth)
kW
A
COP
dB (A)
dB
dB (A)
dB
mm
Exterior appearance
( Munsell color )
kg
Net weight
Compressor type & Q'ty
Motor (Starting method)
Refrigerant oil
Refrigerant
Refrigerant (3)
equipment
Heat exchanger
Refrigerant control
Deice control
Fan type & Q'ty
Motor
Colling
Air handling
Air flow
equipment
Heating
Fresh air intake
Air filter, Quality / Quantity
Shock & vibration absorber
Electric heater
Operation switch
Operation
Room temperature control
control
Operation Display
Installation
data
Attached length of piping
Fine snow
Stucco white
( 8.0Y 9.3/0.1 ) near equivalent
( 4.2Y 7.5/1.1 ) near equivalent
9.5
—
—
35
RM-B5077MDE1 ( Rotary type ) x 1
0.90 ( Line starting )
0.35 ( DIAMOND FREEZE MA68 )
R410A 1.05 (Pre-Charged up to the piping length of 15m)
Louver fins & inner grooved tubing
M fins & inner grooved tubing
Capillary tubes + Electronic expansion valve
Microcomputer control
Tangential fan x 1
Propeller fan x 1
38
24
Hi: 10.1 Me: 6.4 Lo: 5.0
31.5
Hi: 12.8 Me: 9.4 Lo: 6.1
27.8
Not possible
—
Polypropylene net ( washable ) x 2
—
—
Cushion rubber ( for compressor )
—
—
Wireless-Remote control
—
Microcomputer thermostat
—
RUN: Green, TIMER: Yellow, HI POWER: Green, 3D AUTO: Green
Compressor overheat protection, Overcurrent protection,
Frost protection, Serial signal error protection, Indoor fan motor error protection,
Heating overload protection( High pressure control ), Cooling overload protection
Liquid line: φ6.35 ( 1/4" )
Gas line: φ9.52 ( 3/8" )
Flare connecting
kW
kg
W
CMM
Safety devices
Refrigerant piping size ( O.D )
connecting method
mm
Liquid line : 0.53
m
Gas Line : 0.40
Insulation for piping
Refrigerant line (one way )length
Vertical height difference between
outdoor unit and indoor unit
Drain hose
Power cable
Recommended breaker size
Size x Core numbe
Connection wiring
Connecting method
Accessories (included)
Optional parts
Operation
Cooling
Heating
—
Necessary ( Both sides ), independent
Max.15
Max.10 ( Outdoor unit is higher )
m
Max.10 ( Outdoor unit is lower )
Connectable ( VP 16 )
—
—
16
1.5mm2 x 4 cores ( Including earth cable )
Terminal block ( Screw fixing type )
Mounting kit, Clean filter ( Allergen clear filter x 1, Photocatalytic washable deodorizing filter x 1 )
Interface kit ( SC-BIKN-E )
A
Note (1) The data are measured at the following conditions.
Item
SRC35ZJ-S
Outdoor unit
3500 (1000 (Min.) ~ 3800 (Max.))
4000 (1300 (Min.) ~ 4800 (Max.))
1 Phase, 220 ~ 240 V, 50Hz
1.01 (0.21 ~ 1.24)
1.00 (0.29 ~ 1.45)
4.9 / 4.7 / 4.5 (220/ 230/ 240 V)
4.9 / 4.7 / 4.5 (220/ 230/ 240 V)
4.9 / 4.7 / 4.5 (220/ 230/ 240 V)
3.47
4.00
Hi: 42 Me: 32 Lo: 22
50
58
62
Hi: 43 Me: 37 Lo: 25
51
59
63
294×798×229
540×780(+62)×290
Inrush current
Operation
data (1)
SRK35ZJ-S
Indoor air temperature
DB
WB
27ºC
19ºC
20ºC
—
The pipe length is 7.5m.
Outdoor air temperature
DB
WB
35ºC
24ºC
7ºC
6ºC
Standards
ISO-T1 , JIS C 9612
(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) The operation data are applied to the 220/230/240V districts respectively.
(4) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.
(Purging is not required even for the short piping.)
RWA000Z225 a
-
-
45
45
798
229
Content
A
Gas piping
φ9.52(3/8") (Flare)
B
Liquid piping
φ6.35(1/4") (Flare)
C
Hole on wall for right rear piping
(φ65)
D
Hole on wall for left rear piping
(φ65)
E
Drain hose
VP16
F
Outlet for wiring
G
Outlet for piping(on both side)
3
Wireless remote controller
9
60
150
294
G
45
Installation plate
106.5
Unit
106.5
585
450
209
60
F
17.3
Wired - remote controller
(Option)
65
48.9
139
(Service space)
100
7.7
(Service space)
(ervice space)
-
Outlet for down piping
(Refer to the above view)
50
(1) Indoor units
Symbol
31
60
2 EXTERIOR DIMENSIONS
60
Models SRK20ZJ-S, 25ZJ-S, 35ZJ-S
790
14.5
(Service space)
19
Notes (1) The model name label is attached
on the underside of the panel.
(2) It takes the interface kit (SC-BIKN-E)
to connect the wired remote controller.
D
55
E
B
A
55
403.6
471.6
531.8
Space for installation and service when viewing from the front
C
15
7.2
Unit:mm
'09•SRK-DB-087D
RLA000Z051
47
47
279.1
120
Notes
50.6
(1) It must not be surrounded by walls on the four sides.
E
(2) The unit must be fixed with anchor bolts. An anchor bolt must not
protrude more than 15mm.
24.3
63.4
D
(3) Where the unit is subject to strong winds, lay it in such
a direction that the blower outlet faces perpendicularly
to the dominant wind direction.
(4) Leave 1m or more space above the unit.
351.6
(6) The model name label is attached on the lower right comer of the front panel.
14.8
69.4
312.5
290
(5) A wall in front of the blower outlet must not exceed the units height.
390.6
111.6
510
158.4
L3
Intake
L2
L4
17.9
( Service
space )
(2) Outdoor units
12
Models SRC20ZJ-S, 25ZJ-S, 35ZJ-S
390.6
Intake
780
61.9
Outlet
L1
-
-
Minimum installation space
Terminal block
138.4
33.5
Examples of
installation
Dimensions
Ⅰ
Ⅱ
L1
Open
280
280
180
L2
100
75
Open
Open
L3
100
80
80
80
250
Open
250
Open
C
42.5
97.7
15.8
Content
A
Service valve connection (gas side)
φ9.52 (3/8") (Flare)
B
Service valve connection (liquid side)
φ6.35 (1/4") (Flare)
C
Pipe/cable draw-out hole
D
Drain discharge hole
φ20 x 2places
E
Anchor bolt hole
M10 x 4places
A
Unit:mm
'09•SRK-DB-087D
RCV000Z006 A
40°
40°
540
Ⅳ
L4
Symbol
B
Ⅲ
M
M
5
Item
CNE-CNY
FMI
SMI
LM1,2
M
5
RD
BK
WH
Y
BL
5
FMI
CNY
CNX
HD
ThI
Th2,3
1 3 4 5 6
CNM
CNU
G
DS
F
T
Va
Y/G
PRINTED
CIRCUIT
BOARD
F
HEAT
EXCHANGER
L
Mark
-
250V 3.15A
-
U
BK
BL
RD
WH
Y
Y/G
Va
S/N
DS
J
HEAT
EXCHANGER
CNG
2
DISPLAY
o
2
o
t
2
o
t
t
WIRELESS
R-AMP
HD
BACK-UP SW
1 2/N
Th3
Th2
Y/G
8
RD
2
Color
Black
Blue
Red
White
Yellow
Yellow/Green
3
ThI
※
※35 ONLY
TO OUTDOOR
UNIT
T
Power Source
1 Phase
220/230/240V 50Hz
'09•SRK-DB-087D
RWA000Z226
INTERFACE KIT
5
CNE
WH
CNF
BK
CNS
Description
Connector
Fan motor
Flap motor
Louver motor
Humidity sensor
Room temp. sensor
Heat exch. sensor
Diode stack
Fuse
Terminal block
Varistor
(1) Indoor units
SMI
3 ELECTRICAL WIRING
M
LM1
Models SRK20ZJ-S, 25ZJ-S, 35ZJ-S
LM2
3
N
]
POWER SOURCE
1〜220-240V 50Hz/1〜220V 60Hz
(OR)
SIGNAL WIRE
2
(Y)
1
PWB ASSY
POWER
TRANSISTOR
T1 T2
250V 15A
L
1
N
2
t°
(BK) R.IN
(WH) S.IN
F2
＋
NOISE
FILTER
＋
250V 20A
3
F4
(Y/G) G1
TERMINAL
BLOCK
T
PAM
CIRCUIT
250V 10A
CN20S
NU
NV
NW
V
U (RD)
V (WH)
(BK)
W W
CNFAN
SWITCHING POWER
CIRCUIT
CNEEV
CNTH
U
M
3～
CM
F3 250V 1A
250V 2A
(RD) C-2
F1
(Y/G)
P
(2) Outdoor units
[
L
POWER WIRES
Models SRC20ZJ-S, 25ZJ-S, 35ZJ-S
TO INDOOR UNIT
M
FMo
-
-
20S
t° t° t°
M
EEV
TH1 TH2 TH3
5 or 6 wires
Power cable, indoor-outdoor connecting wires
Model
MAX running current
(A)
Power cable size
(mm 2 )
Power cable length
(m)
indoor-outdoor
wire size x number
Earth wire size
(mm)
Item
25
8
2.0
32
φ1.6mm x 3
φ1.6mm
35
Mark
Color
Compressor motor
BK
Black
CNEEV〜20S
Connector
OR
Orange
EEV
Electric expansion valve (coil)
RD
Red
FMo
Fan motor
WH
White
L
Reactor
Y
Yellow
T
Terminal block
Y/G
Yellow/Green
TH1
Heat exchanger sensor (ioutdoor unit)
TH2
Outdoor air temp.sensor
TH3
Discharge pipe temp.sensor
20S
Solenoid valve for 4 way valve
'09•SRK-DB-087D
RWC000Z213 A
The specifications shown in the above table are for units without heaters. For units with heaters, refer
to the installation instructions or the construction instructions of the indoor unit.
Switchgear of Circuit breaker capacity which is calculated from MAX. over current should be chosen
along the regulations in each country.
The cable specifications are based on the assumption that a metal or plastic conduit is used with no
more than three cables contained in a conduit and a voltage drop is 2%. For an installation falling
outside of these conditions, please follow the internal cabling regulations. Adapt it to the regulation
in effect in each country.
Description
CM
20
'09•SRK-DB-087D
4 NOISE LEVEL
Condition
Model SRK20ZJ-S
(Indoor Unit)
Model
SRK20ZJ-S
Cooling
33 dB(A)
Noise
Level
Heating
36 dB(A)
ISO-T1, JIS C9612
× ...... Cooling　Heating
70
70
N70
Sound Pressure Level (dB)
(standard 2 x10-5Pa)
60
60
N60
50
50
N50
40
40
N40
30
30
N30
20
10
63
20
N20
125
250
500
1k
2k
Mid Octave Band frequency(Hz)
(Outdoor Unit)
Model
SRC20ZJ-S
Cooling
47 dB(A)
Noise
Level
Heating
46 dB(A)
× ...... Cooling　4k
8k
Heating
70
70
N70
60
Sound Pressure Level (dB)
(Standard 2 x10-5Pa)
10
60
N60
50
50
N50
40
40
N40
30
30
N30
20
20
N20
10
63
125
250
500
1k
2k
4k
Mid Octave Band Frequency(Hz)
-
-
8k
10
'09•SRK-DB-087D
Model SRK25ZJ-S
Condition
(Indoor Unit)
Model
SRK25ZJ-S
Cooling
34 dB(A)
Noise
Level
Heating
39 dB(A)
ISO-T1, JIS C9612
× ...... Cooling　Heating
70
70
N70
Sound Pressure Level (dB)
(standard 2×10-5Pa)
60
60
N60
50
50
N50
40
40
N40
30
30
N30
20
20
N20
10
63
125
250
500
1k
2k
Mid Octave Band frequency(Hz)
(Outdoor Unit)
Model
SRC25ZJ-S
Cooling
48 dB(A)
Noise
Level
Heating
49 dB(A)
× ...... Cooling　4k
10
Heating
70
70
N70
60
Sound Pressure Level (dB)
(Standard 2 x10-5Pa)
8k
60
N60
50
50
N50
40
40
N40
30
30
N30
20
20
N20
10
63
125
250
500
1k
2k
4k
Mid Octave Band Frequency(Hz)
-
10 -
8k
10
'09•SRK-DB-087D
Model SRK35ZJ-S
Condition
(Indoor Unit)
Model
SRK35ZJ-S
Cooling
42 dB(A)
Noise
Level
Heating
43 dB(A)
ISO-T1, JIS C9612
× ...... Cooling　Heating
70
70
N70
Sound Pressure Level (dB)
(standard 2 x10-5Pa)
60
60
N60
50
50
N50
40
40
N40
30
30
N30
20
20
N20
10
63
125
250
500
1k
2k
Mid Octave Band frequency(Hz)
(Outdoor Unit)
Model
SRC35ZJ-S
Cooling
50 dB(A)
Noise
Level
Heating
51 dB(A)
× ...... Cooling　4k
8k
10
Heating
70
70
N70
Sound Pressure Level (dB)
(Standard 2 x10-5Pa)
60
60
N60
50
50
N50
40
40
N40
30
30
N30
20
20
N20
10
63
125
250
500
1k
2k
4k
Mid Octave Band Frequency(Hz)
-
11 -
8k
10
'09•SRK-DB-087D
5 PIPING SYSTEM
Models SRK20ZJ-S, 25ZJ-S
Cooling cycle
Indoor unit
Flare
connection
Gas pipie
Heat
(φ9.52)
exchanger
sensor
(Th22)
Room temp.
sensor
(Th1)
Heating cycle
Outdoor unit
Service valve
(Gas)
Discharge pipe
temp. sensor
(TH3)
Check joint
4way valve
Muff ler
Muf fler
Accumlator
Heat
exchanger
Heat
exchanger
Heat
exchanger
sensor
(Th21)
Outdoor air
temp. sensor
(TH2)
Compressor
Liquid
pipe
(φ6.35)
Service valve
(Liquid)
Strainer
Flare connection
Capillary tube
Electronic
expansion valve
(EEV)
Capillary tube
Heat
exchanger
sensor
(TH1)
Strainer
Model SRK35ZJ-S
Cooling cycle
Indoor unit
Room temp.
sensor
(Th1)
Flare
connection
Heat
exchanger
sensor
(Th22)
Gas pipie
(φ9.52)
Heating cycle
Outdoor unit
Service valve
(Gas)
Discharge pipe
temp. sensor
(TH3)
Check joint
4way valve
Muff ler
Muf fler
Accumlator
Heat
exchanger
Heat
exchanger
Heat
exchanger
sensor
(Th21)
Outdoor air
temp. sensor
(TH2)
Compressor
Liquid
pipe
(φ6.35)
Flare connection
Capillary tube
Electronic
expansion valve
(EEV)
Capillary tube
Service valve
(Liquid)
Strainer
Strainer
-
12 -
Heat
exchanger
sensor
(TH1)
6 APPLICATION DATA
RLA012A012
(1) Installation of indoor unit
• This instruction manual illustrates the method of installing an indoor
unit.
• For outdoor unit installation and refrigerant piping, please refer to
page 17.
• A wired remote control unit is supplied separately as an optional part.
• When install the unit, be sure to check whether the selection of
installation place, power supply specifications, usage limitation (piping
length, height differences between indoor and outdoor units, power
supply voltage and etc.) and installation spaces.
• Keep the installation manual together with owner’s manual at a place where
any user can read at any time. Moreover if necessary, ask to hand them to a
new user.
• For installing qualified personnel, take precautions in respect to themselves by
using suitable protective clothing, groves, etc., and then perform the
installation works.
• Please pay attention not to fall down the tools, etc. when installing the unit at
the high position.
• If unusual noise can be heard during operation, consult the dealer.
• Symbols which appear frequently in the text have the following meaning:
Observe instructions
with great care
Strictly prohibited
Provide proper
earthing
WARNING
-
13 -
• Tighten the flare nut by torque wrench with specified method.
If the flare nut were tightened with excess torque, this may cause burst and
refrigerant leakage after a long period.
• The electrical installation must be carried out by the qualified
electrician in accordance with “the norm for electrical work” and
“national wiring regulation”, and the system must be connected to
the dedicated circuit.
Power supply with insufficient capacity and incorrect function done by
improper work can cause electric shocks and fire.
• Be sure to shut off the power before starting electrical work.
Failure to shut off the power can cause electric shocks, unit failure or
incorrect function of equipment.
• Be sure to use the cables conformed to safety standard and cable
ampacity for power distribution work.
Unconformable cables can cause electric leak, anomalous heat production
or fire.
• This appliance must be connected to main power supply by means
of a circuit breaker or switch (fuse:16A) with a contact separation of
at least 3mm.
• When plugging this appliance, a plug conforming to the norm
IEC60884-1 must be used.
• Use the prescribed cables for electrical connection, tighten the
cables securely in terminal block and relieve the cables correctly to
prevent overloading the terminal blocks.
Loose connections or cable mountings can cause anomalous heat
production or fire.
• Arrange the wiring in the control box so that it cannot be pushed up
further into the box. Install the service panel correctly.
Incorrect installation may result in overheating and fire.
• Be sure to switch off the power supply in the event of installation,
inspection or servicing.
If the power supply is not shut off, there is a risk of electric shocks, unit
failure or personal injury due to the unexpected start of fan.
• Do not put the drainage pipe directly into drainage channels where
poisonous gases such as sulphide gas can occur.
Poisonous gases will flow into the room through drainage pipe and
seriously affect the user’s health and safety.
• Ensure that no air enters in the refrigerant circuit when the unit is
installed and removed.
If air enters in the refrigerant circuit, the pressure in the refrigerant circuit
becomes too high, which can cause burst and personal injury.
• Do not processing, splice the power cord, or share a socket with
other power plugs.
This may cause fire or electric shock due to defecting contact, defecting
insulation and over-current etc.
• Do not bundling, winding or processing for the power cord. Or, do
not deforming the power plug due to tread it.
This may cause fire or heating.
٤ Before installation check that the power supply matches the air conditioner.
• Use the circuit breaker with sufficient breaking capacity.
If the breaker does not have sufficient breaking capacity, it can cause the
unit malfunction and fire.
• Earth leakage breaker must be installed.
If the earth leakage breaker is not installed, it can cause electric shocks.
• Install isolator or disconnect switch on the power supply wiring in
accordance with the local codes and regulations.
• Be sure to install indoor unit properly according to the instruction
manual in order to run off the drainage smoothly.
Improper installation of indoor unit can cause dropping water into the room
and damaging personal property.
• Install the drainage pipe to run off drainage securely according to
the installation manual.
Incorrect installation of the drainage pipe can cause dropping water into the
room and damaging personal property.
• Be sure to install the drainage pipe with descending slope of 1/100
or more, and not to make traps and air-bleedings.
Check if the drainage runs off securely during commissioning and ensure
the space for inspection and maintenance.
• Secure a space for installation, inspection and maintenance
specified in the manual.
Insufficient space can result in accident such as personal injury due to
falling from the installation place.
• For installation work, be careful not to get injured with the heat
exchanger, piping flare portion or screws etc.
• Be sure to insulate the refrigerant pipes so as not to condense the
ambient air moisture on them.
Insufficient insulation can cause condensation, which can lead to moisture
damage on the ceiling, floor, furniture and any other valuables.
• When perform the air conditioner operation (cooling or drying
operation) in which ventilator is installed in the room. In this case,
using the air conditioner in parallel with the ventilator, there is the
possibility that drain water may backflow in accordance with the
room lapse into the negative pressure status. Therefore, set up the
opening port such as incorporate the air into the room that may
appropriate to ventilation (For example; Open the door a little). In
addition, just as above, so set up the opening port if the room lapse
into negative pressure status due to register of the wind for the high
rise apartment etc.
• Do not install the unit in the locations listed below.
• Locations where carbon fiber, metal powder or any powder is floating.
• Locations where any substances that can affect the unit such as sulphide
gas, chloride gas, acid and alkaline can occur.
• Vehicles and ships.
• Locations where cosmetic or special sprays are often used.
• Locations with direct exposure of oil mist and steam such as kitchen and
machine plant.
• Locations where any machines which generate high frequency harmonics
are used.
• Locations with salty atmospheres such as coastlines.
• Locations with heavy snow (If installed, be sure to provide base flame and
snow hood mentioned in the manual).
• Locations where the unit is exposed to chimney smoke.
• Locations at high altitude (more than 1000m high).
• Locations with ammonic atmospheres.
• Locations where heat radiation from other heat source can affect the unit.
• Locations without good air circulation.
• Locations with any obstacles which can prevent inlet and outlet air of the
unit.
• Locations where short circuit of air can occur (in case of multiple units
installation).
• Locations where strong air blows against the air outlet of outdoor unit.
It can cause remarkable decrease in performance, corrosion and damage
of components, malfunction and fire.
• Do not install the indoor unit in the locations listed below (Be sure
to install the indoor unit according to the installation manual for
each model because each indoor unit has each limitation).
• Locations with any obstacles which can prevent inlet and outlet air of the
unit.
• Locations where vibration can be amplified due to insufficient strength of
structure.
• Locations where the infrared receiver is exposed to the direct sunlight or
the strong light beam (in case of the infrared specification unit).
• Locations where an equipment affected by high harmonics is placed (TV
set or radio receiver is placed within 1m).
• Locations where drainage cannot run off safely.
It can affect performance or function and etc.
• Do not install the unit near the location where leakage of
combustible gases can occur.
If leaked gases accumulate around the unit, it can cause fire.
• Do not install the unit where corrosive gas (such as sulfurous acid
gas etc.) or combustible gas (such as thinner and petroleum gases)
can accumulate or collect, or where volatile combustible
substances are handled.
Corrosive gas can cause corrosion of heat exchanger, breakage of plastic
parts and etc. And combustible gas can cause fire.
• Do not use the indoor unit at the place where water splashes may
occur such as in laundries.
Since the indoor unit is not waterproof, it can cause electric shocks and
fire.
• Do not install nor use the system close to the equipment that
generates electromagnetic fields or high frequency harmonics.
Equipment such as inverters, standby generators, medical high frequency
equipments and telecommunication equipments can affect the system, and
cause malfunctions and breakdowns. The system can also affect medical
equipment and telecommunication equipment, and obstruct its function or
cause jamming.
• Do not place any variables which will be damaged by getting wet
under the indoor unit.
When the relative humidity is higher than 80% or drainage pipe is clogged,
condensation or drainage water can drop and it can cause the damage of
valuables.
• Do not install the remote control at the direct sunlight.
It can cause malfunction or deformation of the remote control.
• Do not use the unit for special purposes such as storing foods,
cooling precision instruments and preservation of animals, plants or
art.
It can cause the damage of the items.
• Do not use any materials other than a fuse with the correct rating in
the location where fuses are to be used.
Connecting the circuit with copper wire or other metal thread can cause
unit failure and fire.
• Do not touch any buttons with wet hands.
It can cause electric shocks.
• Do not touch any refrigerant pipes with your hands when the
system is in operation.
During operation the refrigerant pipes become extremely hot or extremely
cold depending the operating condition, and it can cause burn injury or
frost injury.
SELECTION OF INSTALLATION LOCATION
(Install at location that meets the following conditions, after getting approval from the customer)
Indoor unit
5 cm m
inim
from the um
wall
6.5 cm minimum from the ceiling
Installation board
'09•SRK-DB-087D
• Installation must be carried out by the qualified installer.
If you install the system by yourself, it may cause serious trouble such as
water leaks, electric shocks, fire and personal injury, as a result of a
system malfunction.
• Install the system in full accordance with the instruction manual.
Incorrect installation may cause bursts, personal injury, water leaks, electric
shocks and fire.
• Be sure to use only for household and residence.
If this appliance is installed in inferior environment such as machine shop
and etc., it can cause malfunction.
• Use the original accessories and the specified components for
installation.
If parts other than those prescribed by us are used, It may cause water
leaks, electric shocks, fire and personal injury.
• Install the unit in a location with good support.
Unsuitable installation locations can cause the unit to fall and cause
material damage and personal injury.
• Ventilate the working area well in the event of refrigerant leakage
during installation.
If the refrigerant comes into contact with naked flames, poisonous gas is
produced.
• When installing in small rooms, take prevention measures not to
exceed the density limit of refrigerant in the event of leakage.
Consult the expert about prevention measures. If the density of refrigerant
exceeds the limit in the event of leakage, lack of oxygen can occur, which
can cause serious accidents.
• After completed installation, check that no refrigerant leaks from
the system.
If refrigerant leaks into the room and comes into contact with an oven or
other hot surface, poisonous gas is produced.
• Use the prescribed pipes, flare nuts and tools for R410A.
Using existing parts (for R22 or R407C) can cause the unit failure and
serious accidents due to burst of the refrigerant circuit.
BEFORE INSTALLATION
• Carry out the electrical work for ground lead with care.
Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults
such as electric shocks due to short-circuiting.
CAUTION
SAFETY PRECAUTIONS
• We recommend you to read this “SAFETY PRECAUTIONS” carefully before the
installation work in order to gain full advantage of the functions of the unit and
to avoid malfunction due to mishandling.
• The precautions described below are divided into
WARNING and
CAUTION . The matters with possibilities leading to
serious consequences such as death or serious personal injury due to
erroneous handling are listed in the
WARNING and the matters with
possibilities leading to personal injury or damage of the unit due to erroneous
handling including probability leading to serious consequences in some cases
are listed in
CAUTION . These are very important precautions for safety.
Be sure to observe all of them without fail.
• Be sure to confirm no anomaly on the equipment by commissioning after
completed installation and explain the operating methods as well as the
maintenance methods of this equipment to the user according to the owner’s
manual.
WARNING
• Do not vent R410A into the atmosphere : R410A is a fluorinated
• Do not perform any change of protective device itself or its setup
greenhouse gas, covered by the Kyoto Protocol with Global
condition.
Warming Potential (GWP)=1975.
The forced operation by short-circuiting protective device of pressure
• Do not run the unit with removed panels or protections.
switch and temperature controller or the use of non specified component
Touching rotating equipments, hot surfaces or high voltage parts can cause can cause fire or burst.
personal injury due to entrapment, burn or electric shocks.
SELECTION OF INSTALLATION LOCATION
5 cm m
inim
from the um
wall
(Install at location that meets the following conditions, after getting approval from the customer)
Indoor unit
1
Installation board
(Attached to the rear of the indoor unit)
1
2
Wireless remote control
1
3
Remote control holder
1
4
Tapping screws
(for installation board ø4 X 25mm)
5
5
Wood screws
(for remote control switch holder ø3.5 X 16mm)
2
6
Battery [R03 (AAA, Micro) 1.5V]
2
7
Air-cleaning filters
2
8
Filter holders
(Attached to the front panel of indoor unit)
2
9
Insulation (#486 50 x 100 t3)
1
Option parts
Q’ty
Wireless remote control
٤ A place where the air conditioner can be received the signal surely during operating the wireless remote control.
٤ Places where there is no affected by the TV and radio etc.
٤ Do not place where exposed to direct sunlight or near heat devices such as a stove.
Installation of Installation board
14 -
1
Putty
1
Drain hose (extension hose)
1
Piping cover
(for insulation of connection piping)
1
Outdoor side
Sleeve
(sold separately)
putty
putty
450
Fixing on concrete wall
Use of nut anchor
Use of bolt anchor
Level position (2 locations)
Bolt
(M6 12)
Mating mark for
level surface
Remote control holder
Wood screws
Nut
(M6)
Relation between setting plate and indoor unit
Mounting
board
Max.10
Mounting
board
INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)
Indoor unit
٤ Adjustment of the installation board in the horizontal direction is to
be conducted with four screws in a temporary tightened state.
Installation board
٤ Adjust so the board will be
50
level by turning the board
with the standard hole as
the center.
Standard
hole
Space for service
139
450
106.5
585
Space for service 100
209
106.5
48.9
-
Inclination plate
Indoor side
Wireless remote control
Look for the inside wall structures (Intermediats support or pillar
and firmly install the unit after level surface has been checked.)
1
Sleeve
CAUTION
Completely seal the hole on
the wall with putty. Otherwise,
furniture, or other, may be
wetted by leaked water or
dewing.
INSTALLATION OF INDOOR UNIT
1
Sealing plate
Installation board
10 cm m
inim
from the um
wall
Drilling of holes and fixture of sleeve (Option parts)
2
3
ø65
Knife
Indoor side
Saw
Thickness of the wall + 1.5cm
Outdoor side
Tape measure
Installing the support of piping
5
Hammer
In case of piping in the right rear direction
Shaping of pipings
Torque wrench
8
Hole core drill (65mm in diameter)
9
Wrench key (Hexagon) [4m/m]
10
Flaring tool set
11
Gas leak detector
12
Gauge for projection adjustment
Used when flare is made by using
conventional flare tool
13
(
Pipe bender
Outdoor side
Installed state
Taping of the exterior
55
Piping for Liquid (20 to 50 type) : 6ø .35
Piping for Gas (20 to 35 type) : ø9.52
(50 type)
: ø12.7
55
Piping for Gas 403.6
Piping for Liquid 471.6
Drain hose (ø16) 531.8
Piping hole (ø65)
Piping hole (ø65)
• Matters of special notice when piping from left or central/rear of the unit.
[Top view]
[Drain hose changing procedures]
Left-hand-side piping
Right-hand-side piping
Piping in the left rear direction
1. Remove the drain hose
2. Remove the drain cap.
Piping in the right rear direction
Pipings
~ 61.0N·m
( 14.0
(1.4 ~ 6.1kgf·m) )
Piping in the left direction
Piping in the right direction
Drain hose
(
)
specifically
( Designed
)
for R410A
Designed specifically
for R410A
)
٤ Hold the bottom of the
piping and fix direction
before stretching it and
shaping it.
٤ Tape only the portion
that goes through the
wall.
٤ Always tape the wiring
with the piping.
Sufficient care must be taken not to damage
the panel when connecting pipes.
Piping is possible in the rear, left, left rear, left downward, right or downward direction.
٤ Remove the screw and drain hose,
making it rotate.
3. Insert the drain cap.
٤ Remove it with hand or pliers.
4. Connect the drain hose.
Right
Rear
Left
Downward rear
Left
Left downward
٤ Insert the drain cap which was removed ٤ Insert the drain hose securely, making
at procedure “2” securely using a
rotate. And install the screw.
hexagonal wrench etc.
Note: Be careful that If it is not Inserted
Note: Be careful that If it is not Inserted
securely, water leakage may
securely, water leakage may occur.
occur.
'09•SRK-DB-087D
Spanner wrench
Indoor side
٤ In case of rear piping draw out, cut off the lower
and the right side portions of the sleeve collar.
4
7
Turn to
tighten
a
٤ Drill a hole with whole core drill.
6
c
b
b Top
5
Plus headed driver
47
Necessary tools for the installation work
47
When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use pipe hole sleeve sold separately.
1
65 Space for service
Q’ty
6.5 cm minimum from the ceiling
٤ Where there is no obstructions to the air flow and where the cooled and heated air can be evenly distributed.
٤ A solid place where the unit or the wall will not vibrate.
٤ A place where there will be enough space for servicing. (Where space mentioned below can be secured)
٤ Where wiring and the piping work will be easy to conduct.
٤ The place where receiving part is not exposed to the direct rays of the sun or the strong rays of the street lighting.
٤ A place where it can be easily drained.
٤ A place separated at least 1m away from the television or the radio. (To prevent interference to images and sounds.)
٤ Places where this unit is not affected by the high frequency equipment or electric equipment.
٤ Avoid installing this unit in place where there is much oil mist.
٤ Places where there is no electric equipment or household under the installing unit.
7.7
Standard accessories (Installation kit)
Accessories for indoor unit
279.1
٤ Before installation check that the power supply matches the air conditioner.
system is in operation.
During operation the refrigerant pipes become extremely hot or extremely
cold depending the operating condition, and it can cause burn injury or
frost injury.
set or radio receiver is placed within 1m).
• Locations where drainage cannot run off safely.
It can affect performance or function and etc.
• Do not install the unit near the location where leakage of
combustible gases can occur.
If leaked gases accumulate around the unit, it can cause fire.
7.2
BEFORE INSTALLATION
This may cause fire or electric shock due to defecting contact, defecting
insulation and over-current etc.
• Do not bundling, winding or processing for the power cord. Or, do
not deforming the power plug due to tread it.
This may cause fire or heating.
15 Space for service
Poisonous gases will flow into the room through drainage pipe and
seriously affect the user’s health and safety.
• Ensure that no air enters in the refrigerant circuit when the unit is
installed and removed.
If air enters in the refrigerant circuit, the pressure in the refrigerant circuit
becomes too high, which can cause burst and personal injury.
Fixing of indoor unit
Since this air conditioner has been designed to collect dew drops on the rear
surface to the drain pan, do not attach the power cord above the gutter.
Latch (2 locations)
Installation Steps
1 Pass the pipe through
the hole in the wall,
and hook the upper
part of the indoor unit
to the installation board.
Indoor unit
Wall
1 Push up at the marked portion of the indoor unit base lower latch, and slightly
pull it toward you. (both right and left hand sides) (The indoor unit base lower
latch can be removed from the installation board)
2 Push up the indoor unit upward. So the indoor unit will be removed from the
installation board.
Pipe accommodating section
Drainage
٤ Arrange the drain hose in a downward angle.
٤ Avoid the following drain piping.
2 Gently push the lower
part to secure the unit.
Installation board
Gutter
• How to remove the indoor unit from the installation board
CAUTION Go through all installation steps and check if the
drainage is all right. Otherwise water leak may occur.
Odor from
the gutter
Wall
Installation board
Higher than specified
The drain hose
tip is in water.
Wavy
The gap to the ground is
5 cm or less.
The drain hose
tip is in the gutter.
٤ Pour water to the drain pan located under the heat exchanger, and ensure that the water is discharged outdoor.
٤ When the extended drain hose is indoor, always use a shield pipe (to be arranged by the user) and ensure it is
thermally insulated.
Shield pipe
Indoor unit base latch
The marked portion of the indoor unit base lower latch.
Drain hose
When it is exposed indoor.
Extended drain hose
CONNECTION OF REFRIGERANT PIPINGS
Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.
Indoor
-
15 -
Press
Remove
(Do not turn)
٤ Remove the flared nuts. (on both liquid and gas sides)
90 ± 0.5˚
Preparation
٤ Install the removed flared nuts to the pipes to be connected,
then flared the pipes.
• Flaring work
Measurement B (mm)
Measurement B
Flaring
block
Dimension A
Liquid side ø6.35 : 9.1 (mm)
Gas side ø9.52 : 13.2 (mm)
ø12.7 : 16.6 (mm)
A
Copper pipe
Copper pipe diameter
Clutch type flare tool for
R410A
ø6.35
0.0 - 0.5
Conventional (R22) flare tool
Clutch type
Wing nut type
1.0 - 1.5
1.5 - 2.0
ø9.52
0.0 - 0.5
1.0 - 1.5
1.5 - 2.0
ø12.7
0.0 - 0.5
1.0 - 1.5
2.0 - 2.5
CAUTION
Do not apply refrigerating machine
oil to the flared surface.
Connection
Indoor
Insulation of the connection portion
Liquid side
Gas side
Cover the coupling with insulator and then cover it with tapes.
Vinyl tape
Use an attached insulation pad for heat insulation.
(Do not turn)
٤ Connect the pipes on both liquid and gas sides.
٤ Tighten the nuts to the following torque.
Liquid side (ø6.35) : 14.0 - 18.0 N·m (1.4 - 1.8 kgf·m)
Gas side (ø9.52) : 34.0 - 42.0 N·m (3.4 - 4.2 kgf·m)
(ø12.7) : 49.0 - 61.0 N·m (4.9 - 6.1 kgf·m)
Position it so that the slit area faces upward.
• Cover the indoor unit s flare-connected joints, after they are checked for a gas leak,
with an indoor unit heat insulating material and then wrap them with a tape with an
attached insulation pad placed over the heat insulating material’s slit area.
CAUTION
Do not apply excess torque to the flared nuts.
Otherwise, the flared nuts may check depending.
Finishing work and fixing
Refrigerant piping
Use a flare tool designed for R410A or a conventional flare tool.
Please note that measurement B (protrusion from the flaring block) will vary depending on the
type of a flare tool in use.
If a conventional flare tool is used, please use a copper pipe gauge or a similar instrument to
check protrusion so that you can keep measurement B to a correct value.
Connection wiring,
Earth wiring
Outer tape
Drain hose
Wood screw
Clamp
How to remove and fit the front panel
٤ Removing
1 Remove the air inlet panel.
2 Remove the 2 set screws.
3 Remove the 3 latches in the upper section.
4 Move the lower part of the panel forward and
push upwards to remove.
٤ Fitting
1 Do remove the air filter.
2 Cover the body with the front panel.
3 Fit the 3 latches in the upper section.
4 Tighten the 2 set screws.
5 Fit the air filter.
6 Fit the air inlet panel.
Set screws
ELECTRICAL WIRING WORK
Screw
Installing the air-cleaning filters
'09•SRK-DB-087D
Open/close and detachment/attachment of the air inlet panel
٤ To open, pull the panel at both ends of lower part
and release latches, then pull up the panel until
you feel resistance.
(The panel stops at approx. 60 open position)
٤ To close, hold the panel at both ends of lower
part to lower downward and push it slightly until
the latch works.
٤ To remove, pull up the panel to the position
shown in right illustration and pull it toward you.
٤ To install, insert the panel arm into the slot on the
front panel from the position shown in right
illustration, hold the panel at both ends of lower
part, lower it downward slowly, then push it
slightly until the latch works.
Cover the exterior portion with outer tape and
shape the piping so it will match the contours
of the route that the piping to take.
Also fix the wiring and pipings to the wall with
clamps.
illustration, hold the panel at both ends of lower
part, lower it downward slowly, then push it
slightly until the latch works.
4 Tighten the 2 set screws.
5 Fit the air filter.
6 Fit the air inlet panel.
Set screws
ELECTRICAL WIRING WORK
Preparation of indoor unit
Installing the air-cleaning filters
Screw
Lid
CAUTION
In case of faulty wiring connection, the indoor unit stops, and
then the run lamp turns on and the timer lamp blinks.
Mounting of connecting wires
1
2
3
4
Remove the lid.
Remove the terminal cover.
Remove the wiring clamp.
Connect the connecting wire securely to the terminal block.
1) Connect the connection wire securely to the terminal
block. If the wire is not affixed completely, contact will be
poor, and it is dangerous as the terminal block may heat
up and catch fire.
2) Take care not to confuse the terminal numbers for indoor
and outdoor connections.
5 Fix the connecting wire by wiring clamp.
6 Attach the terminal cover.
7 Attach the lid.
Terminal
cover
Terminal block
Use cables for interconnection wiring to avoid loosening of the
wires.
CENELEC code for cables Required field cables.
1. Open the air inlet panel and remove the air filters.
2. Install the filter holders, with the air-cleaning filters installed in the holders.
In the air conditioner.
• Each air-cleaning filter can be installed in the left or right filter holder.
3. Install the air filters and close the inlet panel.
1 2N 3
H05RNR4G1.5 (example) or 245IEC57
H Harmonized cable type
05 300/500 volts
R Natural-and/or synth, rubber wire insulation
N Polychloroprene rubber conductors insulation
R Stranded core
4or5 Number of conductors
G One conductor of the cable is the earth conductor
(yellow/green)
1.5 Section of copper wire (mm2)
Air-cleaning filter
Filter holder
Clamp
INSTALLATION TEST CHECK POINTS
INSTALLATION OF WIRELESS CONTROL
Mounting method of battery
Fixing to pillar or wall
٤ Uncover the wireless remote control, and mount the batteries
[R03 (AAA, Micro), ˜2 pieces] in the body regularly.
(Fit the poles with the indication marks, 㧗 & 㧙 without fail)
٤ Conventionally, operate the wireless remote control by holding
in your hand.
٤ Avoid installing it on a clay wall etc.
-
16 -
CAUTION
Do not use new and
old batteries together.
6 Battery
Check the following points again after completion of the installation, and before turning on the power. Conduct a test run again and ensure that the unit operates properly.
At the same time, explain to the customer how to use the unit and how to take care of the unit following the user’s manual.
After installation
The power supply voltage is correct as the rating.
No gas leaks from the joints of the operation valve.
Power cables and crossover wires are securely fixed to the terminal board.
Operation valve is fully open.
The pipe joints for indoor and outdoor pipes have been insulated.
Test run
2 Wireless remote control
Cover
5 Wood screws
ø3.5 X 16
HOW TO RELOCATE OR DISPOSE OF THE UNIT
٤ In order to protect the environment, be sure to pump down (recovery of refrigerant).
٤ Pump down is the method of recovering refrigerant from the indoor unit to the
outdoor unit when the pipes are removed from the unit.
• Forced cooling operation
Turn on a power supply again after a while after turn off a power supply.
Then press continually the ON/OFF button 5 seconds or more.
Air conditioning operation is normal.
No abnormal noise.
Water drains smoothly.
Protective functions are not working.
The remote control is normal.
Operation of the unit has been explained to the customer.
(Three-minutes restart preventive timer)
When the air conditioner is restarted or when changing the operation, the unit
will not start operating for approximately 3 minutes.
This is to protect the unit and it is not a malfunction.
CONCERNING TERMINAL CONNECTION FOR AN INTERFACE
1 Remove the front panel and lid of control.
2 Remove the control.
3 There is a terminal (respectively marked with CNS) for the indoor control board.
Indoor unit PCB
In connecting an interface, connect to the respective terminal securely with the connection harness
supplied with an optional “Interface connection kit SC-BIKN-E” and fasten the connection harness
onto the indoor control box with the clamp supplied with the kit.
For more details, please refer to the user’s manual of your “Interface connection kit SC-BIKN-E”.
CNS terminal
Unit ON/OFF button
Lid of control
'09•SRK-DB-087D
<How to pump down>
1 Connect charge hose to check joint of outdoor unit.
2 Liquid side : Close the liquid valve with hexagon wrench key.
Gas side : Fully open the gas valve.
Carry out cooling operation. (If indoor temperature is low, operate
forced cooling operation.)
3 After low pressure gauge become 0.01MPa, stop cooling operation
and close the gas valve.
RWC012A030A
No
Model 20·25·35
R410A REFRIGERANT USED
(2) Installation of outdoor unit
●D
A
●A
T
A
●D
● In
●A
• This installation manual deals with outdoor units and general installation specifications only. For indoor units, refer to page 13.
• When install the unit, be sure to check whether the selection of installation place, power supply specifications, usage limitation (piping length, height differences between indoor and outdoor units, power
supply voltage and etc.) and installation spaces.
SAFETY PRECAUTIONS
• We recommend you to read this “SAFETY PRECAUTIONS” carefully before the installation work in order to
gain full advantage of the functions of the unit and to avoid malfunction due to mishandling.
WARNING and
CAUTION . The matters with
• The precautions described below are divided into
possibilities leading to serious consequences such as death or serious personal injury due to erroneous handling
WARNING and the matters with possibilities leading to personal injury or damage of the
are listed in the
unit due to erroneous handling including probability leading to serious consequences in some cases are listed
CAUTION . These are very important precautions for safety. Be sure to observe all of them without fail.
in
• Be sure to confirm no anomaly on the equipment by commissioning after completed installation and explain the
operating methods as well as the maintenance methods of this equipment to the user according to the owner’s
manual.
• Keep the installation manual together with owner’s manual at a place where any user can read at any time.
Moreover if necessary, ask to hand them to a new user.
• For installing qualified personnel, take precautions in respect to themselves by using suitable protective
clothing, groves, etc., and then perform the installation works.
• Please pay attention not to fall down the tools, etc. when installing the unit at the high position.
• If unusual noise can be heard during operation, consult the dealer.
• Symbols which appear frequently in the text have the following meaning:
Observe instructions
with great care
Strictly prohibited
1. H
Provide proper earthing
1)
WARNING
-
17 -
• Tighten the flare nut by torque wrench with specified method.
If the flare nut were tightened with excess torque, this may cause
burst and refrigerant leakage after a long period.
• Do not open the operation valves for liquid line and gas line
until completed refrigerant piping work, air tightness test and
evacuation.
If the compressor is operated in state of opening operation valves
before completed connection of refrigerant piping work, air can be
sucked into refrigerant circuit, which can cause bust or personal injury
due to anomalously high pressure in the refrigerant.
• The electrical installation must be carried out by the qualified
electrician in accordance with “the norm for electrical work”
and “national wiring regulation”, and the system must be
connected to the dedicated circuit.
Power supply with insufficient capacity and incorrect function done by
improper work can cause electric shocks and fire.
• Be sure to shut off the power before starting electrical work.
Failure to shut off the power can cause electric shocks, unit failure or
incorrect function of equipment.
• Be sure to use the cables conformed to safety standard and
cable ampacity for power distribution work.
Unconformable cables can cause electric leak, anomalous heat
production or fire.
• This appliance must be connected to main power supply by
means of a circuit breaker or switch (fuse:16A) with a contact
separation of at least 3mm.
• Use the prescribed cables for electrical connection, tighten the
cables securely in terminal block and relieve the cables
correctly to prevent overloading the terminal blocks.
Loose connections or cable mountings can cause anomalous heat
production or fire.
• Arrange the wiring in the control box so that it cannot be
pushed up further into the box. Install the service panel
correctly.
Incorrect installation may result in overheating and fire.
• Be sure to fix up the service panels.
Incorrect fixing can cause electric shocks or fire due to intrusion of
dust or water.
• Be sure to switch off the power supply in the event of
installation, inspection or servicing.
If the power supply is not shut off, there is a risk of electric shocks,
unit failure or personal injury due to the unexpected start of fan.
• Stop the compressor before disconnecting refrigerant pipes in
case of pump down operation.
If disconnecting refrigerant pipes in state of opening operation valves
before compressor stopping, air can be sucked, which can cause
burst or personal injury due to anomalously high pressure in the
refrigerant circuit
• Only use prescribed optional parts. The installation must be
carried out by the qualified installer.
If you install the system by yourself, it can cause serious trouble such
as water leaks, electric shocks, fire.
• Ensure that no air enters in the refrigerant circuit when the unit
is installed and removed.
If air enters in the refrigerant circuit, the pressure in the refrigerant
circuit becomes too high, which can cause burst and personal injury.
• Do not processing, splice the power cord, or share a socket
with other power plugs.
This may cause fire or electric shock due to defecting contact,
defecting insulation and over-current etc.
• Do not bundling, winding or processing for the power cord. Or,
do not deforming the power plug due to tread it.
This may cause fire or heating.
• Do not run the unit with removed panels or protections.
Touching rotating equipments, hot surfaces or high voltage parts can
cause personal injury due to entrapment, burn or electric shocks.
• Do not perform any change of protective device itself or its
setup condition.
The forced operation by short-circuiting protective device of pressure
switch and temperature controller or the use of non specified
component can cause fire or burst.
• Carry out the electrical work for ground lead with care.
Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults such as electric shocks due to short-circuiting.
CAUTION
• Use the circuit breaker with sufficient breaking capacity.
If the breaker does not have sufficient breaking capacity, it can cause
• Take care when carrying the unit by hand.
If the unit weights more than 20kg, it must be carried by two or more
• When perform the air conditioner operation (cooling or drying
operation) in which ventilator is installed in the room. In this
2)
3)
'09•SRK-DB-087D
• Installation must be carried out by the qualified installer.
If you install the system by yourself, it may cause serious trouble such
as water leaks, electric shocks, fire and personal injury, as a result of a
system malfunction.
• Install the system in full accordance with the instruction
manual.
Incorrect installation may cause bursts, personal injury, water leaks,
electric shocks and fire.
• Be sure to use only for household and residence.
If this appliance is installed in inferior environment such as machine
shop and etc., it can cause malfunction.
• Use the original accessories and the specified components for
installation.
If parts other than those prescribed by us are used, It may cause
water leaks, electric shocks, fire and personal injury.
• Install the unit in a location with good support.
Unsuitable installation locations can cause the unit to fall and cause
material damage and personal injury.
• Ensure the unit is stable when installed, so that it can
withstand earthquakes and strong winds.
Unsuitable installation locations can cause the unit to fall and cause
material damage and personal injury.
• Ventilate the working area well in the event of refrigerant
leakage during installation.
If the refrigerant comes into contact with naked flames, poisonous gas
is produced.
• Use the prescribed pipes, flare nuts and tools for R410A.
Using existing parts (for R22 or R407C) can cause the unit failure and
serious accidents due to burst of the refrigerant circuit.
• Do not processing, splice the power cord, or share a socket
with other power plugs.
This may cause fire or electric shock due to defecting contact,
defecting insulation and over-current etc.
Touching rotating equipments, hot surfaces or high voltage parts can
cause personal injury due to entrapment, burn or electric shocks.
component can cause fire or burst.
• Carry out the electrical work for ground lead with care.
Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults such as electric shocks due to short-circuiting.
CAUTION
• Use the circuit breaker with sufficient breaking capacity.
• Take care when carrying the unit by hand.
• When perform the air conditioner operation (cooling or drying
If the breaker does not have sufficient breaking capacity, it can cause
If the unit weights more than 20kg, it must be carried by two or more
operation) in which ventilator is installed in the room. In this
the unit malfunction and fire.
persons. Do not carry by the plastic straps, always use the carry
case, using the air conditioner in parallel with the ventilator,
• Earth leakage breaker must be installed.
handle when carrying the unit by hand. Use gloves to minimize the risk
there is the possibility that drain water may backflow in
If the earth leakage breaker is not installed, it can cause electric
of cuts by the aluminum fins.
accordance with the room lapse into the negative pressure
shocks.
• Dispose of any packing materials correctly.
status. Therefore, set up the opening port such as incorporate
• Install isolator or disconnect switch on the power supply wiring
Any remaining packing materials can cause personal injury as it
the air into the room that may appropriate to ventilation (For
in accordance with the local codes and regulations.
contains nails and wood. And to avoid danger of suffocation, be sure
example; Open the door a little). In addition, just as above, so
• After maintenance, all wiring, wiring ties and the like, should be
to keep the plastic wrapper away from children and to dispose after
set up the opening port if the room lapse into negative
returned to their original state and wiring route, and the
tear it up.
pressure status due to register of the wind for the high rise
necessary clearance from all metal parts should be secured.
• Be sure to insulate the refrigerant pipes so as not to condense
apartment etc.
• Secure a space for installation, inspection and maintenance
the ambient air moisture on them.
specified in the manual.
Insufficient insulation can cause condensation, which can lead to
Insufficient space can result in accident such as personal injury due to
moisture damage on the ceiling, floor, furniture and any other
falling from the installation place.
valuables.
-
18 -
• Do not install the unit in the locations listed below.
• Locations where carbon fiber, metal powder or any powder is floating.
• Locations where any substances that can affect the unit such as
sulphide gas, chloride gas, acid and alkaline can occur.
• Vehicles and ships.
• Locations where cosmetic or special sprays are often used.
• Locations with direct exposure of oil mist and steam such as kitchen
and machine plant.
• Locations where any machines which generate high frequency
harmonics are used.
• Locations with salty atmospheres such as coastlines.
• Locations with heavy snow (If installed, be sure to provide base
flame and snow hood mentioned in the manual).
• Locations where the unit is exposed to chimney smoke.
• Locations at high altitude (more than 1000m high).
• Locations with ammonic atmospheres.
• Locations where heat radiation from other heat source can affect the
unit.
• Locations without good air circulation.
• Locations with any obstacles which can prevent inlet and outlet air
of the unit.
• Locations where short circuit of air can occur (in case of multiple
units installation).
• Locations where strong air blows against the air outlet of outdoor
unit.
It can cause remarkable decrease in performance, corrosion and
damage of components, malfunction and fire.
Check before installation work
Accessories for outdoor unit
Q’ty
1 Grommet (Heat pump type only)
2 Drain elbow (Heat pump type only)
1
1
Option parts
a
b
c
d
e
Sealing plate
Sleeve
Inclination plate
Putty
Drain hose (extension hose)
Piping cover
f
(for insulation of connection piping)
Q’ty
1
1
1
1
1
1
the system, and cause malfunctions and breakdowns. The system
can also affect medical equipment and telecommunication equipment,
and obstruct its function or cause jamming.
• Do not install the outdoor unit in a location where insects and
small animals can inhabit.
Insects and small animals can enter the electric parts and cause
damage or fire. Instruct the user to keep the surroundings clean.
• Do not use the base flame for outdoor unit which is corroded
or damaged due to long periods of operation.
Using an old and damage base flame can cause the unit falling down
and cause personal injury.
• Do not use any materials other than a fuse with the correct
rating in the location where fuses are to be used.
Connecting the circuit with copper wire or other metal thread can
cause unit failure and fire.
• Do not touch any buttons with wet hands.
It can cause electric shocks.
• Do not touch any refrigerant pipes with your hands when the
system is in operation.
During operation the refrigerant pipes become extremely hot or
extremely cold depending the operating condition, and it can cause
burn injury or frost injury.
• Do not touch the suction or aluminum fin on the outdoor unit.
This may cause injury.
• Do not put anything on the outdoor unit and operating unit.
This may cause damage the objects or injury due to falling to the
object.
Necessary tools for the installation work
1
2
3
4
5
6
7
8
1
Plus headed driver
Knife
Saw
Tape measure
Hammer
Spanner wrench
Torque wrench [14.0~62.0N·m (1.4~6.2kgf·m)]
Hole core drill (65mm in diameter)
9 Wrench key (Hexagon) [4m/m]
10 Vacuum pump
Vacuum pump adapter (Anti-reverse flow type)
11
(Designed specifically for R410A)
12 Gauge manifold (Designed specifically for R410A)
13 Charge hose (Designed specifically for R410A)
14 Flaring tool set (Designed specifically for R410A)
15 Gas leak detector (Designed specifically for R410A)
Gauge for projection adjustment
16
(Used when flare is made by using conventional flare tool)
2
3
'09•SRK-DB-087D
• Model name and power source
• Refrigerant piping length
• Piping, wiring and miscellaneous small parts
• Indoor unit installation manual
• Do not install the outdoor unit in the locations listed below.
• Locations where discharged hot air or operating sound of the
outdoor unit can bother neighborhood.
• Locations where outlet air of the outdoor unit blows directly to
plants.
• Locations where vibration can be amplified and transmitted due to
insufficient strength of structure.
• Locations where vibration and operation sound generated by the
outdoor unit can affect seriously (on the wall or at the place near bed
room).
• Locations where an equipment affected by high harmonics is placed
(TV set or radio receiver is placed within 5m).
• Locations where drainage cannot run off safely.
It can affect surrounding environment and cause a claim.
• Do not install the unit near the location where leakage of
combustible gases can occur.
If leaked gases accumulate around the unit, it can cause fire.
• Do not install the unit where corrosive gas (such as sulfurous
acid gas etc.) or combustible gas (such as thinner and
petroleum gases) can accumulate or collect, or where volatile
combustible substances are handled.
Corrosive gas can cause corrosion of heat exchanger, breakage of
plastic parts and etc. And combustible gas can cause fire.
• Do not install nor use the system close to the equipment that
generates electromagnetic fields or high frequency harmonics.
Equipment such as inverters, standby generators, medical high
frequency equipments and telecommunication equipments can affect
2. R
30A
Notabilia as a unit designed for R410A
● Do
SED
not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional refrigerant.
A cylinder containing R410A has a pink indication mark on the top.
● A unit designed for R410A has adopted a different size indoor unit operation valve charge port and a different size check joint provided in the unit to prevent the charging of a wrong refrigerant by mistake.
The processed dimension of the flared part of a refrigerant pipe and a flare nut's parallel side measurement have also been altered to raise strength against pressure.
Accordingly, you are required to arrange dedicated R410A tools listed in the table on the right before installing or servicing this unit.
● Do not use a charge cylinder. The use of a charge cylinder will cause the refrigerant composition to change, which results in performance degradation.
● In charging refrigerant, always take it out from a cylinder in the liquid phase.
● All indoor units must be models designed exclusively for R410A. Check connectable indoor unit models in a catalog, etc. (A wrong indoor unit, if connected into the system, will impair proper system operation)
1. HAULAGE AND INSTALLATION
the unit as close as possible to the installation site before removing it from
the packaging.
● When you have to unpack the unit for a compelling reason before you haul it to the
installation point, hoist the unit with nylon slings or ropes and protection pads so that
you may not damage the unit.
alves
e
be
such
● The
right hand side of the unit as viewed from the front (diffuser side) is heavier.
A person carrying the right hand side must take heed of this fact. A person carrying
the left hand side must hold with his right hand the handle provided on the front panel
of the unit and with his left hand the corner column section.
The height of a wall is 1200mm or less.
（mm）
Model 20, 25, 35
Be careful of the following conditions and choose an installation place.
〇 Where air is not trapped.
〇 Where the installation fittings can be firmly installed.
〇 Where wind does not hinder the intake and outlet pipes.
〇 Out of the heat range of other heat sources.
〇 A place where stringent regulation of electric noises is applicable.
〇 Where it is safe for the drain water to be discharged.
〇 Where noise and hot air will not bother neighboring residents.
〇 Where snow will not accumulate.
〇 Where strong winds will not blow against the outlet pipe.
〇 A place where no TV set or radio receiver is placed within 5m.
(If electrical interference is caused, seek a place less likely to cause the problem)
〇 If a operation is conducted when the outdoor air temperature is -5℃ lower, the outdoor unit should be installed
at a place where it is not influenced by natural wind.
〇 Where it is likely that the unit is subjected to strong winds, provide wind guards according to the following guidelines.
Strong winds can cause performance degradation, an accidental stop due to a rise of high pressure and a broken fan.
Ⅱ
280
75
80
Open
Ⅲ
280
Open
80
250
5) Installation
① Anchor bolt fixed position
111
510
Intake
Ⅳ
180
Open
80
Open
L2
Intake
Wind direction
L3
service
( space )
L4
Intake
Outlet
L1
② Notabilia for installation
157.8
Fasten with bolts
(M10-12)
Outlet
Use a long block to
extend the width.
● In installing the unit, fix the unit’s legs with bolts specified on the left.
● The protrusion of an anchor bolt on the front side must be kept within 15 mm.
● Securely install the unit so that it does not fall over during earthquakes or strong
● Refer to the above illustrations for information regarding concrete foundations.
● Install the unit in a level area. (With a gradient of 5 mm or less.)
Over 500mm
Wind direction
L1
L2
L3
L4
Ⅰ
Open
100
100
250
Use a thicker block to anchor deeper.
winds, etc.
Improper installation can result in a compressor failure, broken piping within the unit and abnormal noise generation.
'09•SRK-DB-087D
1.Place the unit outlet pipe perpendicular to the wind direction.
2.Install so the direction of the air from the blowing outlet will be
perpendicular to the direction of the wind.
Example installation
Size
3) Selecting the installation location
s
ssure
Heavy
24.3
es in
19 -
ks,
● Walls surrounding the unit in the four sides are not acceptable.
● There must be a 1-meter or larger space in the above.
● When more than one unit are installed side by side, provide a 250mm
or wider interval between them as a
service space. In order to facilitate servicing of controllers, please provide a sufficient space between units
so that their top plates can be removed easily.
● Where a danger of short-circuiting exists, install guide louvers.
● When more than one unit are installed, provide sufficient intake space consciously so that short-circuiting may not occur.
● Where piling snow can bury the outdoor unit, provide proper snow guards.
2) Portage
-
of
4) Installation space
Pad
● Deliver
n the
at
When a unit is hoisted with slings for haulage, take into consideration the offset of its gravity center position.
If not properly balanced, the unit can be thrown off-balance and fall.
312.5
351.6
CAUTION
1) Delivery
(Take particular care in carrying in or moving the unit, and always perform such an operation with two or more persons.)
14.8
me.
288.8
ower
ying
is
ing
or,
s
r,
e
erate
or
rate
orso
so
e
e
2. REFRIGERANT PIPING WORK
2. REFRIGERANT PIPING WORK
1) Restrictions on unit installation and use
1)
unit
installation
and
use and the installation site.
●Restrictions
Check the followingon
points
in light
of the indoor unit
specifications
● Check
●
Observethethefollowing
followingpoints
restrictions
onofunit
andspecifications
use. Improper
can result
in light
theinstallation
indoor unit
andinstallation
the installation
site.in a compressor failure or performance degradation.
● Observe
●
Additional
is notonrequired
at all. and use. Improper installation can result in a compressor failure or performance degradation.
therefrigerant
following charge
restrictions
unit installation
● Additional refrigerant charge is not required at all.
Restrictions
Dimensional restrictions
Restrictions
Dimensional restrictions
Main pipe length
15m or less
Main pipe length
15m or less
When the outdoor unit is positioned higher,
10m or less
Elevation difference between
When the outdoor unit is positioned higher,
10m or less
indoor and
outdoor between
units
Elevation
difference
When the outdoor unit is positioned lower,
10m or less
indoor and outdoor units
When the outdoor unit is positioned lower,
10m or less
CAUTION
CAUTION
ded
ed
own
own
t
t
n
n
When pipe is brazing.
When
pipe is brazing.
About brazing
Refrigerant piping (branch pipeL)
Refrigerant piping (branch pipeL)
Indoor unit connected
Indoor unit connected
Without nitrogen gas, a large quantity of foreign matters (oxidized film) are created,
Brazingamust
performed
under atube
nitrogen
gas flow.
causing
criticalbefailure
from capillary
or expansion
valve clogging.
Without nitrogen gas, a large quantity of foreign matters (oxidized film) are created,
Primary
Secondary side
causing a critical
capillary
tube
or expansion
valvesideclogging.
Plugfailure
the end from
of the pipe
with tape,
or other
material, and fill the pipe with nitrogen gas.
Plug the end of the pipe with tape, or other
＜Npipe
2＞ with nitrogen gas.
material, and fill the
Taping
NitrogenNitrogen
Outdoor unit connected
Outdoor unit connected
About brazing
Brazing must be performed under a nitrogen gas flow.
Model 20, 25, 35
20, 25,Liquid
35 pipe
Gas piModel
pe
Gas pipe
Liquid pipe
Ǿ9.52
Ǿ6.35
Ǿ9.52
Ǿ6.35
Flare
Flare
Flare
Flare
Ǿ9.52
Ǿ6.35
Ǿ9.52
Ǿ6.35
Ǿ9.52
Ǿ6.35
Ǿ9.52
Ǿ6.35
3) Refrigerant pipe wall thickness and material
● Select
refrigerant pipes of the table shown on the right wall thickness and
material as specified for each pipe size.
pipes having
wall thickness larger
the specified
3) Refrigerant
walla thickness
andthan
material
NOTE ● Select pipe
minimum pipe thickness.
refrigerant pipes of the table shown on the right wall thickness and
material as specified for each pipe size.
● Select
4) On-site
piping work
NOTE ● Select pipes having a wall thickness larger than the specified
Nitrogen
gas
Relief valve
Brazing
Only use nitrogen gas (N2)
Nitrogen
gas
Relief valve
Brazing
6.35
9.52
Minimum pipe wall thickness [mm]
0.8
0.8
O-type
6.35pipe
O-type
9.52pipe
Hand
4. E
*Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS 77.150.30
Minimum pipe wall thickness [mm]
minimum
pipecare
thickness.
Take
so that installed pipes may not touch components within a unit.
IMPORTANT If touching with an internal component, it will generate abnormal Pipe
material*
sounds
and/or vibrations.
How to remove the side cover
0.5MPa side
Secondary
Hand
0.5MPa
Station valve
＜N2＞
Taping
Only use nitrogen gas (N2)
Pipe diameter [mm]
Pipe
Pipe material*
diameter [mm]
Station valve
Primary side
0.8
0.8
O-type pipe
O-type pipe
A
Flared pipe end : A (mm)
Copper
pipe outer Ａ 0
ー0．
4
diameter
Ǿ6.35
9．
1
Ǿ9.52
13.2
*Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS 77.150.30
Please remove the screw of a side cover and remove to the front.
● Carry out the on site piping work with
● Give sufficient protection to a pipe end
the operation valve fully closed.
(compressed and blazed, or with an adhesive tape) so
that water or foreign matters may not enter the piping.
● Bend a pipe to a radius as large as practical.(R100∼R150) Do not bend a pipe repeatedly to correct
its form.
● Flare connection is used between the unit and refrigerant pipe. Flare a pipe after engaging a
flare nut onto it. Flare dimensions for R410A are different from those for conventional R407C.
Although we recommend the use of flaring tools designed specifically for R410A, conventional
flaring tools can also be used by adjusting the measurement of protrusion B with a protrusion
control gauge.
●Tighten a flare joint securely.
Screw
Side cover
Copper pipe protrusion for flaring : B
Ele
Ele
D
●
●
(mm)
Copper
In the case of a rigid (clutch) type
pipe outer
diameter With an R410A tool With a conventional tool
Ǿ6.35
0∼0.5
1.0∼1.5
Ǿ9.52
'09•SRK-DB-087D
e tool)
e tool)
L
L
Outdoor unit
Outdoor unit
● The use restrictions appearing in the table above are applicable to the standard pipe size combinations shown in the table below.
● Determine refrigerant pipe size pursuant to the following guidelines based on the
indoor unit specifications.
indoor unit specifications.
20 -
use
use
nit.
nit.
t.
.
H
H
● The use restrictions appearing in the table above are applicable to the standard pipe size combinations shown in the table below.
2) Determination of pipe size
2) Determination of pipe size
● Determine refrigerant pipe size pursuant to the following guidelines based on the
-
he
he
Marks appearing in the drawing on the right
Marks appearing in the drawing on the right
L
L
H
H
H
H
B
m
ment,
m
ment,
and
and
Indoor unit
Indoor unit
●
●
●
●
●
●
●
●
●
CAUTION Do not apply force beyond proper fastening torque in tightening the flare nut.
Fix both liquid and gas operation valves at the valve main bodies as illustrated on the right, and then fasten
●
●
U
G
A
T
D
D
F
D
F
W
flare nut onto it. Flare dimensions for R410A are different from those for conventional R407C.
Although we recommend the use of flaring tools designed specifically for R410A, conventional
flaring tools can also be used by adjusting the measurement of protrusion B with a protrusion
control gauge.
Copper
In the case of a rigid (clutch) type
pipe outer
diameter With an R410A tool With a conventional tool
Ǿ6.35
0∼0.5
1.0∼1.5
Ǿ9.52
Screw
Side cover
●Tighten a flare joint securely.
●
●
●
●
●
●
●
CAUTION Do not apply force beyond proper fastening torque in tightening the flare nut.
●
Fix both liquid and gas operation valves at the valve main bodies as illustrated on the right, and then fasten
them, applying appropriate fastening torque.
Operation valve size (mm)
Tightening torque (N·m)
Tightening angle (°)
Ǿ6.35 (1/4")
14∼18
45∼60
150
Ǿ9.52 (3/8")
34∼42
30∼45
200
●
Recommended length of a tool handle (mm)
A
T
D
D
F
D
F
W
A
Use a torque wrench. If a torque wrench is
not available, fasten the flare nut manually
first and then tighten it further, using the
left table as a guide.
Do not hold the valve cap area with a spanner.
5) Air tightness test
① Although outdoor and indoor units themselves have been tested for air tightness at the factory, check the connecting pipes after the installation work for air tightness
from the operation valve’s check joint equipped on the outdoor unit side. While conducting a test, keep the operation valve shut all the time.
a) Raise the pressure to 0.5 MPa, and then stop. Leave it for five minutes to see if the pressure drops.
b) Then raise the pressure to 1.5 MPa, and stop. Leave it for five more minutes to see if the pressure drops.
c) Then raise the pressure to the specified level (4.15 MPa), and record the ambient temperature and the pressure.
d) If no pressure drop is observed with an installation pressurized to the specified level and left for about one day, it is acceptable. When the ambient Temperature fall
1℃, the pressure also fall approximately 0.01 MPa. The pressure, if changed, should be compensated for.
e) If a pressure drop is observed in checking e) and a) – d), a leak exists somewhere. Find a leak by applying bubble test liquid to welded parts and flare joints and
repair it. After repair, conduct an air-tightness test again.
② In conducting an air-tightness test, use nitrogen gas and pressurize the system with nitrogen gas from the gas side. Do not use a medium other than nitrogen gas
under any circumstances.
6) Evacuation
＜Work flow＞
Airtighteness test completed
-
21 -
Vacuuming begins
When the system has remaining moisture
inside or a leaky point, the vacuum gauge
indicator will rise.
Check the system for a leaky point and
then draw air to create a vacuum again.
Close
Operation Valve
(two-way valve)
Gauge Manifold
(Designed specifically for R410A)
Handle Lo
Handle Hi.
Charge hose
(Designed specifically for R410A)
Vacuum pump adapter
(Anti-reverse flow type)
(Designed specifically for R410A)
Operation Valve
Cap
Vacuum gauge check
Vacuum pump
Charge hose
(Designed specifically for R410A)
Check joint
Fill refrigerant
prevent a different oil from entering, assign dedicated tools, etc. to each refrigerant
type. Under no circumstances must a gauge manifold and a charge hose in particular
be shared with other refrigerant types (R22, R407C, etc.).
○ Use a counterflow prevention adapter to prevent vacuum pump oil from entering the
refrigerant system.
Compound pressure gauge
Pressure gauge
Operation Valve
(three-way valve)
Confirm that the vacuum gauge indicator does not rise even if
the system is left for one hour or more.
○ To
ize
-0.1MPa
(-76cmHg)
Vacuuming completed
Indoor unit
r
ssu
Pre
Operation Valve
Cap
Run the vacuum pump for at least one hour after the vacuum
gauge shows -101kPa or lower. (-755mmHg or lower)
Pay attention to the following points in addition to the above for the R410A and
compatible machines.
Gas side
operation valve
Check joint
Outdoor unit
Securely tighten the operation valve cap and the check joint blind nut after adjustment.
Operation valve size
(mm)
Ǿ6.35 (1/4")
Ǿ9.52 (3/8")
7) Heating and condensation prevention
Operation valve cap
tightening torque (N·m)
Check joint blind nut
tightening torque (N·m)
20∼30
10∼12
Band (accessory)
Pipe cover (accessory)
(1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
●
●
●
●
All gas pipes must be securely heat insulated in order to prevent damage from dripping water that comes from the condensation formed on them during a cooling operation
or personal injury from burns because their surface can reach quite a high temperature due to discharged gas flowing inside during a heating operation.
Wrap indoor units’ flare joints with heat insulating parts (pipe cover) for heat insulation (both gas and liquid pipes).
Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and wrap them
together with a connecting cable by a dressing tape.
Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
Wires for connecting indoor
and outdoor units
Liquid piping
Exterior tape
Gas piping
Insulation
'09•SRK-DB-087D
●
(2) Use a heat insulating material that can withstand 120℃ or a higher temperature. Poor heat insulating capacity can cause heat insulation problems or cable
deterioration.
IN
Che
Exp
Af
●
●
Wrap indoor units’ flare joints with heat insulating parts (pipe cover) for heat insulation (both gas and liquid pipes).
Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no gaps may be left between them and wrap them
together with a connecting cable by a dressing tape.
Both gas and liquid pipes need to be dressed with 20 mm or thicker heat insulation materials above the ceiling where relative humidity exceeds 70%.
IN
and outdoor units
Gas piping
Liquid piping
Ch
Exp
Insulation
Af
3. DRAIN PIPING WORK
●
Execute drain piping by using a drain elbow and drain
grommets supplied separately as optional parts, where
water drained from the outdoor unit is a problem.
●
Water may drip where there is a larger amount of drain
water. Seal around the drain elbow and drain grommets
with putty or adequate caulking material.
CAUTION
Do not put a grommet
on this hole.
This is a supplementary
drain hole to discharge
drain water, when a large
quantity of it is gathered.
● Condensed
water may flow out from vicinity of operation
valve or connected pipes.
●
Where you are likely to have several days of sub-zero
temperatures in a row, do not use a drain elbow and
drain grommets. (There is a risk of drain water
freezing inside and blocking the drain.)
●
Clearance
Drain elbow
Grommet
When condensed water needs to be
led to a drain, etc., install the unit on
a flat base (supplied separately as an
optional part) or concrete blocks.
Then, please secure space for the drain
elbow and the drain hose.
Drain hose
(To be procured on the installer's part)
4. ELECTRICAL WIRING WORK For details of electrical cabling, refer to the indoor unit installation manual.
-
22 -
ol
●
Electrical installation work must be performed by an electrical installation service provider qualified by a power provider of the country.
Electrical installation work must be executed according to the technical standards and other regulations applicable to electrical installations in the country.
Do not use any supply cord lighter than one specified in parentheses for each type below.
braided cord (code designation 60245 IEC 51),
ordinary tough rubber sheathed cord (code designation 60245 IEC 53)
flat twin tinsel cord (code designation 60227 IEC 41);
Use polychloroprene sheathed flexible cord (code designation 60245 IEC57) for supply cords of parts of appliances for outdoor use.
Ground the unit. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod or telephone grounding wire.
If impropery grounded, an electric shock or malfunction may result.
A grounding wire must be connected before connecting the power cable. Provide a grounding wire longer than the power cable.
The installation of an impulse withstanding type earth leakage breaker is necessary. A failure to install an earth leakage breaker can result in an
acccident such as an electric shock or a fire.
Do not turn on the power until the electrical work is completeted .
Do not use a condensive capacitor for power factor improvement under any circumstances. (It dose not improve power factor, while it can cause
an abnormal overheat accident)
RWC012A030A.indd 2
For power supply cables, use conduits.
Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying them together can result
in the malfunctioning or a failure of the unit due to electric noises.
Fasten cables so that may not touch the piping, etc.
When cables are connected, make sure that all electrical components within the electrical component box are free of loose connector coupling or
terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water
penetrates into the box.)
Always use a three-core cable for an indoor-outdoor connecting cable. Never use a shield cable.
CAUTION
●
●
In case of faulty wiring connection, the indoor unit stops,
and then the run lamp turns on and the timer lamp blinks.
●
●
●
Use cables for interconnection wiring to avoid loosening of the wires.
CENELEC code for cables Required field cables.
●
●
●
●
●
●
●
'09•SRK-DB-087D
H05RNR4G1.5 (Example) or 245IEC57
H
Harmonized cable type
05
300/500 volts
R
Natural-and/or synth. rubber wire insulation
N
Polychloroprene rubber conductors insulation
R
Stranded core
4or5 Number of conductors
G
One conductor of the cable is the earth conductor
(yellow/green)
1.5
Section of copper wire (mm2)
●
●
Power supply terminal block
Power cable, indoor-outdoor connecting wires
Cable clamp
○It holds cables in place and protect the terminal
connection from external force.
○This clamp is for the cable in the outside
diameter 9~15mm.
Please adjust it when not suitable.
Cable name plate
Earth leakage breaker
(Harmonic resistant type)
● Always
perform grounding system installation work with the power cord unplugged.
CAUTION
Always use an earth leakage circuit breaker designed for inverter circuits to
prevent a faulty operation.
Switchgear or Circuit breaker
1
2/N
1
2/N
Switchgear or Circuit Breaker
Outdoor unit
3
Phase
Model Earth leakage breaker
Switch breaker Over current protector
rated capacity
Power souce Interconnecting and
grounding wires
(minimum)
(minimum)
●
●
●
●
Power supply terminal block
○It holds cables in place and protect the terminal
connection from external force.
○This clamp is for the cable in the outside
diameter 9~15mm.
Please adjust it when not suitable.
Earth leakage breaker
(Harmonic resistant type)
perform grounding system installation work with the power cord unplugged.
CAUTION
Always use an earth leakage circuit breaker designed for inverter circuits to
prevent a faulty operation.
Switchgear or Circuit Breaker
2/N
Cable name plate
1
2/N
3
○It has stuck on the lid of a control box.
1 2/N
3
Outdoor unit
Phase
Model Earth leakage breaker
20
Indoor unit
Single-phase
25
35
15A,30mA,
0.1sec or less
Switch breaker Over current protector
rated capacity
30A
16A
Power souce Interconnecting and
grounding wires
(minimum)
(minimum)
2.0mm2
1.5mm2×4
●The specifications shown in the above table are for units without heaters. For units with heaters, refer to
○Please be sure to carry out D-type (type III)
the installation instructions or the construction instructions of the indoor unit.
grounding work.
●Switchgear or Circuit breaker capacity which is calculated from MAX. over current should be chosen along the
regulations in each country.
●The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than
three cables contained in a conduit and a voltage drop is 2%. For an installation falling outside of these
conditions, please follow the internal cabling regulations. Adapt it to the regulation in effect in each country.
CAUTION
Please connect the earthed line of indoor and outdoor
connecting wire to a bracket part of the illustration
-
23 -
)
● Always
Switchgear or Circuit breaker
1
Grounding terminal
1.5
Polychloroprene rubber conductors insulation
Stranded core
Number of conductors
One conductor of the cable is the earth conductor
(yellow/green)
Section of copper wire (mm2)
Power cable, indoor-outdoor connecting wires
Cable clamp
)
)
N
R
4or5
G
Do not lay electronic control cables (remote control and signaling wires) and other cables together outside the unit. Laying them together can result
in the malfunctioning or a failure of the unit due to electric noises.
Fasten cables so that may not touch the piping, etc.
When cables are connected, make sure that all electrical components within the electrical component box are free of loose connector coupling or
terminal connection and then attach the cover securely. (Improper cover attachment can result in malfunctioning or a failure of the unit, if water
penetrates into the box.)
Always use a three-core cable for an indoor-outdoor connecting cable. Never use a shield cable.
Indoor - Outdoor
connecting wire
Power cable
power cable, indoor - outdoor connecting wire circuit diagram
INSTALLATION TEST CHECK POINTS
After installation
Power cables and connecting wires are securely fixed to the terminal block.
The pipe joints for indoor and outdoor pipes have been insulated.
The power supply voltage is correct as the rating.
The reverse flow check cap is attached.
The drain hose is fixed securely.
The cover of the pipe cover (A) faces downward to prevent rain from entering.
Operational valve is fully open.
Gaps are properly sealed between the pipe covers (A) (B) and the wall surface / pipes.
No gas leaks from the joints of the operational valve.
'09•SRK-DB-087D
Check the following points again after completion of the installation, and before turnig on the power. Conduct a test run again and ensure that the unit operates properly.
Explain to the customer how to use the unit and how to take care of the unit following the instruction manual.
'09•SRK-DB-087D
7 RANGE OF USAGE & LIMITATIONS
Models
SRK20ZJ-S, 25ZJ-S, 35ZJ-S
Item
Indoor return air temperature
(Upper, lower limits)
Cooling operation : Approximately 18 to 32℃ D.B.
Heating operation : Approximately 10 to 27℃ D.B.
(Refer to the selection chart)
Outdoor air temperature
(Upper, lower limits)
Cooling operation : Approximately -15 to 46℃ D.B.
Heating operation : Approximately -15 to 21℃ D.B.
(Refer to the selection chart)
Refrigerant line (one way) length
Max. 15m
Vertical height difference between
outdoor unit and indoor unit
Max. 10m (Outdoor unit is higher)
Max. 10m (Outdoor unit is lower)
Power source voltage
Rating ±10%
Voltage at starting
Min. 85% of rating
Max. 4 times/h
(Inching prevention 10 minutes)
Frequency of ON-OFF cycle
ON and OFF interval
Min. 3 minutes
Selection chart
Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be
obtained in the following way.
Net capacity = Capacity shown on specification ✕ Correction factors as follows.
(1) Coefficient of cooling and heating capacity in relation to temperatures
Coefficient of cooling &
Heating capacity in
relation to temperature
1.3
1.2
Cooling
1.1
1.0
Heating
0.9
0.8
0.7
0.6
Cooling operation
Outdoor air D.B.
temperature
°C D. B.
Applicable range
46
40
35
30
25
20
26
24
Heating operation
Indoor air D.B.
temperature
°C D. B.
0
-5
-10
-15
Depends on installed situation
14
16
18
Indoor air W.B. temperature °C W.B.
27
25
20
15
10
-15
-10
20
22
ISO-T1 Standard Condition
-5
0
5
10
15
ISO-T1 Standard Condition
Outdoor air W.B. temperature °C W.B.
-
24 -
'09•SRK-DB-087D
(2) Correction of cooling and heating capacity in relation to one way length of refrigerant piping
It is necessary to correct the cooling and heating capacity in relation to the one way piping length between the indoor and outdoor
units.
Piping length [m]
7
10
15
20
25
30
Cooling
1.0
0.99
0.975
0.965
0.95
0.935
Heating
1.0
1.0
1.0
1.0
1.0
1.0
(3) Correction relative to frosting on outdoor heat exchanger during heating
In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the
outdoor heat exchanger.
Air inlet temperature of
outdoor unit in °CWB
-15
-10
-9
-7
-5
-3
-1
1
3
5 or more
Adjustment coefficient
0.95
0.95
0.94
0.93
0.91
0.88
0.86
0.87
0.92
1.00
How to obtain the cooling and heating capacity
Example : The net cooling capacity of the model SRK35ZJ-S with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C
and outdoor dry-bulb temperature 35˚C is Net cooling capacity =
3500
SRK35ZJ-S
-
25 -
✕
0.975
Length 15m
✕
1.0
=
Factor by air
temperatures
3413 W
'09•SRK-DB-087D
8 CAPACITY TABLES
Model SRK20ZJ-S
Heat Mode
Cool Mode
Indoor air temp
Air flow
Hi
7.8
3
(m /min)
Outdoor
air temp.
21˚CDB
14˚CWB
23˚CDB
16˚CWB
26˚CDB
18˚CWB
27˚CDB
19˚CWB
28˚CDB
20˚CWB
31˚CDB
22˚CWB
33˚CDB
24˚CWB
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
10
2.25
1.93
2.36
1.90
2.45
1.99
2.49
1.96
2.53
1.94
2.60
2.02
2.67
1.97
12
2.21
1.91
2.32
1.88
2.41
1.97
2.45
1.95
2.50
1.93
2.58
2.01
2.65
1.96
14
2.17
1.89
2.28
1.86
2.38
1.96
2.42
1.94
2.47
1.91
2.55
2.00
2.62
1.95
16
2.13
1.87
2.24
1.85
2.34
1.94
2.39
1.92
2.43
1.90
2.52
1.99
2.59
1.94
18
2.08
1.85
2.19
1.82
2.30
1.92
2.35
1.90
2.40
1.88
2.49
1.98
2.56
1.93
20
2.04
1.83
2.15
1.81
2.26
1.91
2.31
1.89
2.36
1.87
2.45
1.97
2.53
1.92
22
1.99
1.81
2.10
1.78
2.22
1.89
2.28
1.88
2.32
1.86
2.42
1.95
2.50
1.91
24
1.94
1.78
2.05
1.76
2.18
1.88
2.24
1.86
2.28
1.85
2.38
1.94
2.47
1.90
26
1.90
1.76
2.01
1.74
2.14
1.86
2.20
1.85
2.24
1.83
2.35
1.93
2.43
1.89
28
1.85
1.74
1.96
1.72
2.09
1.84
2.15
1.83
2.20
1.82
2.31
1.92
2.40
1.88
30
1.79
1.71
1.90
1.70
2.05
1.83
2.11
1.82
2.16
1.80
2.27
1.90
2.36
1.87
32
1.74
1.69
1.85
1.68
2.00
1.81
2.07
1.80
2.12
1.79
2.23
1.89
2.32
1.86
34
1.69
1.66
1.80
1.65
1.95
1.79
2.02
1.78
2.07
1.77
2.19
1.88
2.28
1.85
35
1.66
1.65
1.77
1.64
1.93
1.78
2.00
1.78
2.05
1.76
2.17
1.87
2.26
1.84
36
1.63
1.63
1.74
1.62
1.90
1.77
1.98
1.77
2.02
1.75
2.15
1.87
2.24
1.83
38
1.58
1.58
1.68
1.60
1.85
1.75
1.93
1.75
1.98
1.74
2.11
1.85
2.20
1.82
39
1.55
1.55
1.66
1.59
1.83
1.74
1.91
1.74
1.95
1.73
2.08
1.84
2.18
1.81
Model SRK25ZJ-S
Air flow
Hi
9.8
(m3/min)
Cool Mode
Indoor air temp
outdoor
air temp.
16˚CDB
18˚CDB
20˚CDB
22˚CDB
24˚CDB
-15˚CWB
1.66
1.63
1.59
1.55
1.52
-10˚CWB
1.88
1.85
1.82
1.78
1.74
-5˚CWB
2.04
2.01
1.97
1.94
1.91
0˚CWB
2.13
2.10
2.07
2.04
2.01
5˚CWB
2.72
2.69
2.67
2.62
2.58
6˚CWB
2.76
2.73
2.70
2.67
2.63
10˚CWB
2.94
2.91
2.89
2.85
2.82
15˚CWB
3.20
3.17
3.14
3.11
3.08
20˚CWB
3.43
3.41
3.39
3.35
3.32
Heat Mode
Indoor air temp
Air flow
Hi
7.9
3
(m /min)
Outdoor
air temp.
21˚CDB
23˚CDB
26˚CDB
27˚CDB
28˚CDB
31˚CDB
33˚CDB
14˚CWB
16˚CWB
18˚CWB
19˚CWB
20˚CWB
22˚CWB
24˚CWB
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
10
2.82
2.23
2.95
2.19
3.06
2.27
3.11
2.24
3.16
2.21
3.26
2.28
3.34
2.21
12
2.77
2.20
2.90
2.17
3.01
2.25
3.07
2.22
3.12
2.20
3.22
2.27
3.31
2.20
14
2.71
2.17
2.85
2.14
2.97
2.23
3.03
2.21
3.08
2.18
3.18
2.25
3.28
2.19
16
2.66
2.15
2.80
2.12
2.92
2.21
2.98
2.19
3.04
2.16
3.15
2.24
3.24
2.18
18
2.60
2.12
2.74
2.09
2.88
2.19
2.94
2.17
2.99
2.14
3.11
2.22
3.20
2.17
20
2.55
2.09
2.68
2.07
2.83
2.17
2.89
2.14
2.95
2.12
3.07
2.21
3.17
2.15
22
2.49
2.06
2.63
2.04
2.78
2.14
2.84
2.12
2.90
2.10
3.02
2.20
3.13
2.14
24
2.43
2.03
2.57
2.01
2.72
2.12
2.80
2.11
2.85
2.08
2.98
2.18
3.08
2.13
26
2.37
2.00
2.51
1.98
2.67
2.10
2.74
2.09
2.80
2.07
2.93
2.16
3.04
2.11
28
2.31
1.97
2.44
1.96
2.61
2.08
2.69
2.07
2.75
2.05
2.89
2.14
3.00
2.10
30
2.24
1.94
2.38
1.92
2.56
2.05
2.64
2.05
2.70
2.03
2.84
2.13
2.95
2.08
32
2.18
1.91
2.31
1.89
2.50
2.03
2.58
2.03
2.64
2.01
2.79
2.11
2.90
2.07
34
2.11
1.88
2.25
1.87
2.44
2.01
2.53
2.00
2.59
1.99
2.74
2.09
2.85
2.05
35
2.08
1.87
2.21
1.85
2.41
1.99
2.50
1.99
2.56
1.97
2.71
2.08
2.83
2.04
36
2.04
1.85
2.18
1.84
2.38
1.98
2.47
1.98
2.53
1.96
2.69
2.08
2.80
2.03
38
1.97
1.82
2.11
1.81
2.32
1.96
2.41
1.96
2.47
1.94
2.63
2.05
2.75
2.02
39
1.94
1.80
2.07
1.79
2.28
1.94
2.38
1.94
2.44
1.93
2.61
2.05
2.72
2.01
Model SRK35ZJ-S
Air flow
Hi
10.6
3
(m /min)
indoor air temp
outdoor
air temp.
16˚CDB
18˚CDB
20˚CDB
22˚CDB
24˚CDB
-15˚CWB
1.97
1.93
1.88
1.84
1.80
-10˚CWB
2.23
2.19
2.16
2.10
2.06
-5˚CWB
2.41
2.38
2.33
2.30
2.27
0˚CWB
2.53
2.49
2.45
2.42
2.38
5˚CWB
3.22
3.19
3.17
3.10
3.06
6˚CWB
3.27
3.24
3.20
3.16
3.12
10˚CWB
3.48
3.45
3.42
3.38
3.34
15˚CWB
3.79
3.75
3.73
3.69
3.65
20˚CWB
4.07
4.04
4.02
3.97
3.94
16˚CDB
18˚CDB
20˚CDB
22˚CDB
24˚CDB
-15˚CWB
2.46
2.41
2.35
2.30
2.25
-10˚CWB
2.79
2.74
2.70
2.63
2.58
-5˚CWB
3.02
2.97
2.91
2.88
2.83
0˚CWB
3.16
3.12
3.06
3.02
2.98
5˚CWB
4.03
3.98
3.96
3.88
3.83
6˚CWB
4.09
4.04
4.00
3.95
3.90
10˚CWB
4.35
4.31
4.28
4.22
4.18
15˚CWB
4.73
4.69
4.66
4.61
4.56
20˚CWB
5.09
5.05
5.02
4.96
4.92
Heat Mode
Cool Mode
Indoor air temp
Air flow
Hi
10.1
(m3/min)
Outdoor
air temp.
21˚CDB
23˚CDB
26˚CDB
27˚CDB
28˚CDB
31˚CDB
33˚CDB
14˚CWB
16˚CWB
18˚CWB
19˚CWB
20˚CWB
22˚CWB
24˚CWB
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
TC
SHC
10
3.94
3.00
4.13
2.95
4.28
3.04
4.35
3.00
4.43
2.97
4.56
3.04
4.68
2.94
12
3.87
2.97
4.06
2.92
4.22
3.02
4.29
2.98
4.37
2.94
4.51
3.02
4.63
2.93
14
3.80
2.93
3.99
2.88
4.16
2.99
4.24
2.96
4.31
2.91
4.46
3.00
4.59
2.91
16
3.72
2.89
3.91
2.85
4.09
2.96
4.18
2.93
4.25
2.89
4.40
2.98
4.54
2.89
18
3.65
2.85
3.84
2.81
4.03
2.93
4.11
2.90
4.19
2.87
4.35
2.96
4.49
2.88
20
3.57
2.81
3.76
2.77
3.96
2.90
4.05
2.87
4.13
2.84
4.29
2.94
4.43
2.85
22
3.49
2.77
3.68
2.73
3.89
2.86
3.98
2.83
4.06
2.80
4.23
2.92
4.38
2.84
24
3.40
2.72
3.59
2.69
3.81
2.83
3.91
2.81
3.99
2.78
4.17
2.89
4.32
2.81
26
3.32
2.68
3.51
2.65
3.74
2.80
3.84
2.78
3.92
2.75
4.11
2.86
4.26
2.80
28
3.23
2.63
3.42
2.61
3.66
2.77
3.77
2.76
3.85
2.72
4.04
2.84
4.20
2.77
30
3.14
2.59
3.33
2.57
3.58
2.74
3.70
2.72
3.78
2.70
3.98
2.82
4.13
2.75
32
3.05
2.54
3.24
2.52
3.50
2.70
3.62
2.69
3.70
2.66
3.91
2.79
4.06
2.73
34
2.95
2.50
3.14
2.48
3.41
2.66
3.54
2.66
3.62
2.63
3.84
2.77
4.00
2.69
35
2.91
2.48
3.10
2.46
3.37
2.65
3.50
2.64
3.58
2.62
3.80
2.75
3.96
2.68
36
2.86
2.46
3.05
2.44
3.33
2.63
3.46
2.63
3.54
2.60
3.76
2.72
3.92
2.67
38
2.76
2.41
2.95
2.40
3.24
2.59
3.38
2.59
3.46
2.57
3.69
2.70
3.85
2.65
39
2.71
2.39
2.90
2.37
3.20
2.57
3.33
2.58
3.42
2.56
3.65
2.69
3.81
2.64
-
26 -
Air flow
Hi
12.8
3
(m /min)
indoor air temp
outdoor
air temp.
'09•SRK-DB-087D
Reference
1 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER
1. Operation control function by remote controller
Operation section
FAN SPEED button
OPERATION MODE select button
Each time the button is pressed, the
display is switched over in turn.
Each time the button pressed, the
display is switched over in turn.
ON/OFF (luminous) button
HI POWER/ECONO button
Press to start operation, press again to
stop.
This button changes the HIGH POWER/
ECONOMY mode.
AIR FLOW (UP/DOWN) button
This button changes the air flow (up/down)
direction.
TEMPERATURE button
These buttons sets the indoor temperature.
(These buttons are used for setting the
current time and timer function as well.)
AIR FLOW (LEFT/RIGHT) button
This button changes the air flow (left/right)
direction.
ON TIMER button
This button selects ON TIMER operation.
3D AUTO button
This button sets 3D AUTO operation.
SLEEP button
OFF TIMER button
This button selects SLEEP operation.
This button selects OFF TIMER operation
ACL switch
CLEAN switch
This switch is for resetting microcomputer
and setting time.
This switch changes the CLEAN mode.
The above illustration shows all controls, but in practice
only the relevant parts are shown.
CANCEL button
This button cancels the ON timer, OFF
timer, and SLEEP operation.
ALLERGEN CLEAR button
This button selects ALLERGEN CLEAR
operation.
Unit display section
Remote control signal receiver
Unit ON/OFF button
This button can be used for turning on/off the unit when remote
control is not available.
RUN (HOT KEEP) light (green)
3D AUTO light (green)
࡮Illuminates during operation.
࡮Blinks when airflow stops due to thëHOT
KEEP̉and̈CLEAN operation̉.
ON
Illuminates during 3D AUTO operation.
HI POWER light (green)
1.5 sec.
Illuminates during HIGH POWER operation.
HOT KEEP
TIMER light (yellow)
OFF
0.5 sec.
CLEAN operation
ON
Illuminates during TIMER operation.
3 sec.
OFF
1 sec.
-
27 -
'09•SRK-DB-087D
2. Unit ON/OFF button
When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this button may be used to
turn the unit on and off.
(1) Operation
Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off.
(2) Details of operation
The unit will go into the automatic mode in which it automatically determines, from indoor temperature (as detected by sensor),
whether to go into the cooling, thermal dry or heating modes.
Function Indoor temperature
Fan speed Flap/Louver Timer Switch
setting
operation mode
Cooling
About 24ºC
Thermal dry
About 25ºC
Heating
About 26ºC
Auto
Auto
Continuous
Unit ON/OFF button
3. Auto restart function
(1) Auto restart function records the operational status of the air-conditioner immediately prior to be switched off by a power cut,
and then automatically resumes operations after the power has been restored.
(2) The following settings will be cancelled:
Jumper wire (JA1)
(a) Timer settings
(b) HIGH POWER operations
Notes (1) Auto restart function is set at on when the air-conditioner is shipped from the factory. Consult with
your dealer if this function needs to be switched off.
(2) When power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer.
(3) If the jumper wire (JA1) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right)
4. Custom cord switching procedure
Jumper wire (JA2)
If two wireless remote controller are installed in one room, in order to prevent wrong operation due to mixed signals, please modify the printed circuit board in the indoor unit’s control
box and the remote controller using the following procedure. Be sure to modify both boards.
If only one board is modified, receiving (and operation) cannot be done.
(1) Modifying the indoor printed circuit board
Take out the printed circuit board from the control box and cut off jumper wire (JA2)
using wire cutters.
After cutting of the jumper wire, take measures to prevent contact with the other the
lead wires, etc.
(2) Modifying the wireless remote controller
(a)Remove the battery.
Cut
(b)Cut the jumper wire shown in the figure at right.
-
28 -
'09•SRK-DB-087D
5. Flap and louver control
Control the flap and louver by AIR FLOW

 (LEFT/RIGHT) button on the wireless remote controller.
(UP/DOWN) and
(1) Flap
Each time when you press the AIR FLOW 
(UP/DOWN) button the mode changes as follows.
(Flap stopped)
(Swing)
Angle of Flap from Horizontal
Remote controller
display
COOL , DRY, FAN
Approx. 10°
Approx. 25°
Approx. 40°
Approx. 50°
Approx. 60°
HEAT
Approx. 25°
Approx. 40°
Approx. 50°
Approx. 60°
Approx. 70°
(2) Louver
Each time when you press the AIR FLOW
(LEFT/RIGHT) button the mode changes as follows.
(Louver stopped)
(Swing)
(Spot)
(Wide)
Angle of Louver
Remote controller
display
Center installation
Left Approx. 50° Left Approx. 20°
Center
Right Approx. 20° Right Approx. 50°
Right end installation Left Approx. 50° Left Approx. 45° Left Approx. 30°
Left end installation Left Approx. 20°
Center
Center
Right Approx. 20°
Right Approx. 30° Right Approx. 45° Right Approx. 50°
(3) Swing
(a) Swing flap
(b) Swing louver
Flap moves in upward and downward
directions continuously.
In HEAT operation
Louver moves in left and right directions continuously.
In COOL, DRY, FAN operation
Approx.
10°
Approx. 25°
Approx. 60°
Approx. 70°
(4) Memory flap (Flap or Louver stopped)
When you press the AIR FLOW (UP/DOWN or LEFT/RIGHT) button once while the flap or louver is operating, it stops swinging
at the position. Since this angle is memorized in the microcomputer, the flap or louver will automatically be set at this angle when
the next operation is started.
(5) When not operating
The f lap returns to the position of air flow directly below, when operation has stopped.
-
29 -
'09•SRK-DB-087D
6. 3D auto operation
Control the flap and louver by 3D AUTO button on the wireless remote controller.
Air f low selection and air flow direction are automatically controlled, allowing the entire indoor to efficiently conditioned.
(1) During Cooling and Heating (Including auto cooling and heating)
(a) Air f low selection is determined according to indoor temperature and setting temperature.
Operation mode
At cooling
At heating
Air flow selection
AUTO
Indoor temp. – Setting temp. >5°C
Indoor temp. – Setting temp. <
= 5°C
HIGH POWER
AUTO
Setting temp. – Indoor temp. >5°C
Setting temp. – Indoor temp. <
= 5°C
HIGH POWER
AUTO
HI
MED
LO
HI
MED
LO
(b) Air f low direction is controlled according to the indoor temperature and setting temperature.
1)
When 3D auto operation starts
Cooling
Flap
Louver
2)
Heating
Up/down Swing
Wide (Fixed)
Center (Fixed)
When Indoor temp. – Setting temp. is <
= 5ºC during cooling and when Setting temp. – Indoor temp. is <
= 5ºC during
heating, the system switches to the following air flow direction control. After the louver swings left and right symmetrically for 3 cycles, control is switched to the control in 3).
Flap
Louver
3)
Cooling
Heating
Horizontal blowing (Fixed)
Slant forwardl blowing (Fixed)
Left/right Swing
After the flap swings for 5 cycles, control is switched to the control in 4).
Cooling
Flap
Louver
4)
For 5 minutes, the following air flow direction control is carried out.
Flap
Louver
5)
Heating
Up/down Swing
Center (Fixed)
Cooling
Horizontal blowing (Fixed)
Heating
Slant forwardl blowing (Fixed)
Wide (Fixed)
After 5 minutes have passed, the air flow direction is determined according to the indoor temperature and setting
temperature.
Operation mode
At cooling
At heating
Air flow direction contorol
2°C < Indoor temp. – Setting temp. <
= 5°C
Control returns to the control in 2).
2°C < Setting temp. – Indoor temp. <
= 5°C
Control returns to the control in 2).
Indoor temp. – Setting temp. <
= 2°C
The control in 4) continues.
Setting temp. – Indoor temp. <
= 2°C
The control in 4) continues.
(2) During DRY Operation (including auto DRY operation)
Air flow selection
Flap
Louver
According to DRY operation.
Horizontal blowing (Fixed)
Wide (Fixed)
-
30 -
Indoor temp. – Setting temp. > 5°C
Control returns to the control in 1).
Setting temp. – Indoor temp. > 5°C
Control returns to the control in 1).
'09•SRK-DB-087D
7. Timer operation
(1) Comfortable timer setting (ON timer)
If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode
operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value
of 15 minutes and the relationship between the indoor temperature at the setting time (temperature of room temperature sensor)
and the setting temperature.
(2) Sleep timer operation
Pressing the SLEEP button causes the temperature to be controlled with respect to the set temperature.
(3) OFF timer operation
The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period.
8. Installation location setting
When the indoor unit is installed at the end of a room, control the air flow direction so that it is not toward the side walls. If you set
the remote controller installation position, keep it so that the air flow is within the range shown in the following figure.
(1) Setting
(a) If the air conditioning unit is running, press the ON/OFF button to stop.
The installation location setting cannot be made while the unit is running.
(b) Press the AIR FLOW
(UP/DOWN) button and the
AIR FLOW
(LEFT/RIGHT) button together for 5 seconds
or more.
The installation location display illuminates.
(c) Setting the air-conditioning installation location.
C, F
Press the AIR FLOW
(LEFT/RIGHT) button and adjust to the desired
location.
D
Each time the AIR FLOW
(LEFT/RIGHT) button is pressed, the
E
indicator is switched in the order of:
(Center Installation)
(Right End Installation)
Airf low range
(Center Installation)
(Left End Installation)
Airf low range
(Right End Installation)
(d) Press the ON/OFF button.
The air-conditioner's installation location is set.
Press within 60 seconds of setting the installation location (while the
installation location setting display illuminates).
-
31 -
Airf low range
(Left End Installation)
'09•SRK-DB-087D
9. Outline of heating operation
(1) Operation of major functional components in heating mode
Heating
Thermostat ON
Thermostat OFF
Failure
Compressor
ON
OFF
OFF
Indoor fan motor
ON
ON(HOT KEEP)
OFF
Outdoor fan motor
ON
OFF
(few minutes ON)
OFF
4-way valve
ON
ON
OFF
(3 minutes ON)
(2) Details of control at each operation mode (pattern)
(a) Fuzzy operation
Deviation between the indoor temperature setting correction temperature and the return air temperature is calculated in
accordance with the fuzzy rule, and used for control of the air capacity and the compressor speed.
Model
SRK20ZJ-S
SRK25ZJ-S
SRK35ZJ-S
Auto
30~115rps
30~115rps
30~115rps
HI
30~115rps
30~115rps
30~115rps
MED
30~66rps
30~72rps
30~76rps
LO
30~40rps
30~42rps
30~46rps
Fan speed
When the defrosting, protection device, etc. is actuated, operation is performed in the corresponding mode.
(b) Hot keep operation
If the hot keep operation is selected during the heating operation, the indoor blower is controlled based on the temperature
of the indoor heat exchanger (Th2) to prevent blowing of cool wind.
(3) Defrosting operation
(a) Starting conditions (Defrosting operation can be started only when all of the following conditions are met.)
1) After start of heating operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
2) After end of defrosting operation
When it elapsed 45 minutes. (Accumulated compressor operation time)
3) Outdoor heat exchanger sensor (TH1) temperature
When the temperature has been below －5ºC for 3 minutes continuously.
4) The difference between the outdoor air sensor temperature and the outdoor heat exchanger sensor temperature
The outdoor air temperature ≧ 0ºC : 7ºC or higher
－15ºC ≦ The outdoor air temperature ＜ 0ºC : 4/15 × The outdoor air temperature + 7ºC or higher
The outdoor air temperature ＜ －15ºC : －5ºC or higher
5) During continuous compressor operation
In addition, when the speed command from the indoor controller of the indoor unit during heating operation has counted
0 rps 10 times or more and all conditions of 1), 2), 3) and 5) above and the outdoor air temperature is 3ºC or less are
satisf ied (note that when the temperature for outdoor heat exchanger sensor (TH1) is －5ºC or less: 62 rps or more,
－4ºC or less: less than 62 rps), defrost operation is started.
(b) Ending conditions (Operation returns to the heating cycle when either one of the following is met.)
1) Outdoor heat exchanger sensor (TH1) temperature: 13ºC or higher
2) Continued operation time of defrosting → For more than 15 min.
-
32 -
'09•SRK-DB-087D
10. Outline of cooling operation
(1) Operation of major functional components in Cooling mode
Cooling
Thermostat ON
Thermostat OFF
Failure
Compressor
ON
OFF
OFF
Indoor fan motor
ON
ON
OFF
Outdoor fan motor
ON
OFF
(few minutes ON)
OFF
(few minutes ON)
4-way valve
OFF
OFF
OFF
(2) Detail of control in each mode (Pattern)
(a) Fuzzy operation
During the fuzzy operation, the air f low and the compressor speed are controlled by calculating the difference between the
indoor temperature setting correction temperature and the return air temperature.
Model
SRK20ZJ-S
SRK25ZJ-S
SRK35ZJ-S
Auto
20~66rps
20~74rps
20~98rps
HI
20~66rps
20~74rps
20~98rps
MED
20~44rps
20~55rps
20~58rps
LO
20~30rps
20~34rps
20~38rps
Fan speed
11. Outline of automatic operation
(1) Determination of operation mode
The unit checks the indoor air temperature and setting temperature and the outdoor air temperature, determines the operation
mode, and then begins in the automatic operation.
Cooling
27.5
25.5
A
Indoor air temperature (˚C)
Dehumidifying
18.0
Heating
30
18
Outdoor air temperature (˚C)
(2) The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previous
operation mode, changes the operation mode.
(a)　If the setting temperature is changed with the remote controller, the operation mode is judged immediately.
(b) When both the indoor and the outdoor air temperatures are in the range “A”, cooling or heating is switched depending on the
difference between the setting temperature and the indoor air temperature.
(c) When the operation mode has been judged following the change of setting temperature with the remote controller, the hourly
judgment of operation mode is cancelled.
(3) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is selected
during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
(4) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of
the wireless remote controller and the setting temperature.
Unit : ºC
Signals of wireless remote controller (Display)
Setting
temperature
–6
–5
–4
–3
–2
–1
±0
+1
+2
+3
+4
+5
Cooling
18
19
20
21
22
23
24
25
26
27
28
29
30
Dehumidifying
19
20
21
22
23
24
25
26
27
28
29
30
31
Heating
20
21
22
23
24
25
26
27
28
29
30
31
32
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33 -
+6
'09•SRK-DB-087D
12. Protective control function
(1) Frost prevention control (During cooling or dehumidifying)
(a) Operating conditions
1)
Indoor heat exchanger temperature (Th2) is lower than 5ºC.
compressor
command
speed
2)5 minutes after reaching the compressor command speed except 0 rps.
(b) Detail of anti-frost operation
Item
Indoor heat exchanger
temperature
5°C or lower
2.5°C or lower
Lower
limit
speed
22 rps
0 rps
0 rps
Lower limit of compressor command speed
Indoor fan
Protects the fan tap just before
Depends on operation mode
frost prevention control
Outdoor fan
Depends on command speed
4-way valve
OFF
2.5
5
8
Indoor heat exchanger
temperature (ºC)
Depends on stop mode
Notes (1) When the indoor heat exchanger temperature is in the range of 2.5~5ºC, the speed is reduced by 4 rps at each 20 seconds.
(2) When the temperature is lower than 2.5ºC, the compressor is stopped.
(3) When the indoor heat exchanger temperature is in the range of 5~8ºC, the compressor command speed is been maintained.
(c) Reset conditions: When either of the following condition is satisfied.
1) The indoor heat exchanger temperature (Th2) is 8ºC or higher.
2) The compressor command speed is 0 rps.
(2) Cooling overload protective control
(a) Operating conditions: When the outdoor air temperature (TH2) has become continuously for 30 seconds at 41ºC or
more, or 47ºC or more with the compressor running, the lower limit speed of compressor is
brought up.
Model
SRK20~35ZJ-S
Item
Outdoor air temperature
Lower limit speed
41°C or more
47°C or more
30 rps
40 rps
(b) Detail of operation
1) The outdoor fan is stepped up by 3 speed step. (Upper limit 7th speed.)
2) The lower limit of compressor command speed is set to 30 or 40 rps and even if the calculated result becomes lower than that
after fuzzy calculation, the speed is kept to 30 or 40 rps. However, when the thermo becomes OFF, the speed is reduced to 0
rps.
(c) Reset conditions: When either of the following condition is satisfied.
1) The outdoor air temperature is lower than 40ºC or 46ºC.
2) The compressor command speed is 0 rps.
(3) Cooling high pressure control
(a) Purpose: Prevents anomalous high pressure operation during cooling.
(b) Detector: Outdoor heat exchanger sensor (TH1)
(c) Detail of operation:
(Example) Fuzzy
6rps(1)
After lapse of 30 sec. or over(3)
6rps
After lapse of 30 sec. or over
(3)
(1)
lower limit
speed 30 rps
After lapse of 30 sec. or over
(3)
0rps
58
53
63
Outdoor heat exchanger temperature (°C)
Notes (1) When the outdoor heat exchanger temperature is in the range of 58~63ºC, the speed is reduced by 6 rps at each 30 seconds.
(2) When the temperature is 63ºC or higher, the compressor is stopped.
(3) When the outdoor heat exchanger temperature is in the range of 53~58ºC, if the compressor command speed is been maintained and the operation has
continued for more than 30 seconds at the same speed, it returns to the normal cooling operation.
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'09•SRK-DB-087D
(4) Cooling low outdoor air temperature protective control
(a) Operating conditions: When the outdoor air temperature (TH2) is 22ºC or lower continues for 20 seconds while the
compressor command speed is other than 0 rps.
(b) Detail of operation:
1)
The lower limit of the compressor command speed is set to 50 <44> (30) rps and even if the speed becomes lower
than 50 <44> (30) rps, the speed is kept to 50 (44) (30) rps. However, when the thermo becomes OFF, the speed is
reduced to 0 rps.
2)
The upper limit of the compressor command speed is set to 50 <50> (60) rps and even if the calculated result becomes higher than that after fuzzy calculation, the speed is kept to 50 <50> (60) rps.
Notes (1) Values in < > are for outdoor air temperature is 0ºC or 3ºC
(2) Values in ( ) are for outdoor air temperature is 22ºC or 25ºC
ON Upper limit 50 rps
Lower limit 50 rps
ON Upper limit 50 rps
Lower limit 44 rps
ON Upper limit 60 rps
Lower limit 30 rps
OFF
E
F
A
B
C
D
Outdoor air temperature.(°C)
Values of A, B, C, D, E, F
Outdoor air temperature. (˚C)
First time
Since the seconds times
E
F
A
B
C
D
–8
–5
0
3
22
25
–2
1
5
8
25
28
(c) Reset conditions: When either of the following condition is satisfied
1)
The outdoor air temperature (TH2) is D ºC or higher.
2)
The compressor command speed is 0 rps.
(5) Heating high pressure control
(a) Purpose: Prevents anomalous high pressure operation during heating.
(b) Detector: Indoor heat exchanger sensor (Th2)
(c) Detail of operation:
(Example) Fuzzy
After lapse of 20 sec. or over(3)
4rps(1)
After lapse of 20 sec. or over(3)
8rps(2)
4rps
After lapse of 20 sec. or over
(3)
(1)
8rps(2)
lower limit
speed 30 rps
0rps
A
C
B
Indoor heat exchanger temperature(°C)
D
Notes (1) When the indoor heat exchanger temperature is in the range of B~C ºC, the speed is reduced by 4 rps at each 20 seconds.
(2) When the indoor heat exchanger temperature is in the range of C~D ºC, the speed is reduced by 8 rps at each 20 seconds. When the temperature is D ºC
or higher continues for 1 minute, the compressor is stopped.
(3) When the indoor heat exchanger temperature is in the range of A~B ºC, if the compressor command speed is been maintained and the operation has continued for more than 20 seconds at the same speed, it returns to the normal heating operation.
(4) Indoor blower retains the fan tap when it enters in the high pressure control. Outdoor blower is operated in accordance with the speed.
Temperature list
RPSmin < 50
50 <
= RPSmin < 91
91 <
= RPSmin < 97
97 <
= RPSmin < 100
100 <
= RPSmin < 115
115 <
= RPSmin
Unit : ºC
A
B
C
D
48
53
55
58
48.5
56
58
61
48.5
56 ~ 52.5
58
61
48.5
52.5 ~ 50.8
58 ~ 56.2
61
48.5 ~ 40.1
50.8 ~ 42
56.2 ~ 47.3
61
40.1
42
47.3
61
Note (1) RPSmin: The lower one between the outdoor speed and the compressor command speed
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'09•SRK-DB-087D
(6) Heating overload protective control
(a) Indoor unit side
1) Operating conditions : When the outdoor air temperature (TH2) is 17ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
2) Detail of operation :
The indoor fan is stepped up by 1 speed step. (Upper limit 8th speed)
3) Reset conditions :
The outdoor air temperature (TH2) is lower than 16ºC.
(b) Outdoor unit side
1) Operating conditions : When the outdoor air temperature (TH2) is 22ºC or higher continues for 30 seconds while
the compressor command speed other than 0 rps.
2) Detail of operation
a) Taking the upper limit of compressor command speed range at 60 rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
b) The lower limit of compressor command speed is set to 40 rps and even if the calculated result becomes lower
than that after fuzzy calculation, the speed is kept to 40 rps. However, when the thermo becomes OFF, the speed is
reduced to 0 prs.
c) Inching prevention control is activated and inching prevention control is carried out with the minimum speed set
at 40 rps.
d) The outdoor fan is set on 2nd speed.
3) Reset conditions: The outdoor air temperature (TH2) is lower than 21ºC.
(7) Heating low outdoor temperature protective control
(a)　Operating conditions:　When the outdoor air temperature (TH2) is lower than -2ºC or higher continues for 30 seconds
while the compressor command speed is other than 0 rps.
(b)　Detail of operation:　The lower limit compressor command speed is change as shown in the figure below.
Lower limit 45 rps
Lower limit 40 rps
Normal operation
-10
-8
-2
2
Outdoor air temperature(°C)
(c) Reset conditions:
When either of the following condition is satisfied.
1) The outdoor air temperature (TH2) becomes -2ºC.
2) The compressor command speed is 0 rps.
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'09•SRK-DB-087D
(8) Compressor overheat protection
(a) Purpose: It is designed to prevent deterioration of oil, burnout of motor coil and other trouble resulting from the
compressor overheat.
(b) Detail of operation
1) Speeds are controlled with temperature detected by the sensor (TH3) mounted on the discharge pipe.
(Example) Fuzzy
4 rps (1)
After lapse of 60 second or over (3)
After lapse of 60 second or over (3)
After lapse of 60 second or over (3)
4 rps
Lower limit (4)
0 rps
90
100
Discharge pipe temperature (˚C)
110
Notes (1) When the discharge pipe temperature is in the range of 100~110ºC, the speed is reduced by 4 rps.
(2) When the discharge pipe temperature is raised and continues operation for 20 seconds without changing, then the speed is reduced again by 4 rps.
(3) If the discharge pipe temperature is in the range of 90~100ºC even when the compressor command speed is maintained for 60 second when the
temperature is in the range of 90~100ºC, the speed is raised by 1 rps and kept at that speed for 60 second. This process is repeated until the command speed is reached.
(4) Lower limit speed
Model
Item
Lower Limit Speed
Cooling
Heating
20 rps
30 rps
2) If the temperature of 110ºC is detected by the sensor on the discharge pipe, then the compressor will stop immediately.
When the discharge pipe temperature drops and the time delay of 3 minutes is over, the unit starts again within 1 hour
but there is no start at the third time.
(9) Current safe
(a) Purpose: Current is controlled not to exceed the upper limit of the setting operation current.
(b) Detail of operation: Input current to the converter is monitored with the current sensor fixed on the printed circuit board
of the outdoor unit and, if the operation current value reaches the limiting current value, the compressor
command speed is reduced.
If the mechanism is actuated when the compressor command speed is less than 30 rps, the compressor
is stopped immediately. Operation starts again after a delay time of 3 minutes.
(10) Current cut
(a) Purpose: Inverter is protected from overcurrent.
(b) Detail of operation: Output current from the inverter is monitored with a shunt resistor and, if the current exceeds the
setting value, the compressor is stopped immediately. Operation starts again after a delay time of
3 minutes.
(11) Outdoor unit failure
This is a function for determining when there is trouble with the outdoor unit during air conditioning.
The compressor is stopped if any one of the following in item (a), (b) is satisfied. Once the unit is stopped by this function, it is not
restarted.
(a) When the input current is measured at 1 A or less for 3 continuous minutes or more.
(b) If the outdoor unit sends a 0 rps signal to the indoor unit 3 times or more within 20 minutes of the power being turned on.
(12) Indoor fan motor protection
When the air conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system.
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'09•SRK-DB-087D
(13) Serial signal transmission error protection
(a) Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals.
(b) Detail of operation: If the compressor is operating and a serial signal cannot be received from the indoor control with
outdoor control having serial signals continues for 7 minute and 35 seconds, the compressor is
stopped.
After the compressor has been stopped, it will be restarted after the compressor start delay if a serial
signal can be received again from the indoor control.
(14) Rotor lock
If the motor for the compressor does not turn after it has been started, it is determined that a compressor lock has occurred and
the compressor is stopped.
(15) Outdoor fan motor protection
If the outdoor fan motor has operated at 75 rpm or under for more than 30 seconds, the compressor and fan motor are stopped.
(16) Outdoor fan control at low outdoor temperature
◆
(a) Operating conditions: When the outdoor air temperature (TH2) is 22ºC or lower continues for 30 seconds while the
Cooling
compressor command speed is other than 0 rps.
(b) Detail of operation: After the outdoor fan operates at A speed for 60 seconds; the corresponding outdoor heat
exchanger temperature shall implement the following controls.
Value of A
Outdoor fan
1)
Outdoor temperature > 10˚C
2nd speed
Outdoor temperature <
= 10˚C
1st speed
Outdoor heat exchanger temperature (TH1) <
= 21ºC
After the outdoor fan speed drops (down) to 1 speed for 60 seconds; if the outdoor heat exchanger temperature is
lower than 21ºC, gradually reduce the outdoor fan speed by 1 speed. (Lower limit 1st speed)
2)21ºC < Outdoor heat exchanger temperature (TH1) <
= 38ºC
After the outdoor fan speed maintains at A speed for 20 seconds; if the outdoor heat exchanger temperature is 21ºC~
38ºC, maintain outdoor fan speed.
3)
Outdoor heat exchanger tempeature (TH1) > 38ºC
After the outdoor fan speed rises (up) to 1 speed for 60 seconds; if the outdoor heat exchanger temperature is higher
than 38ºC, gradually increase outdoor fan speed by 1 speed. (Upper limit 3rd speed)
(c) Reset conditions: When either of the following conditions is satisfied
1)
The outdoor air temperature (TH2) is 25ºC or higher.
2)
The compressor command speed is 0 rps.
◆
(a) Operating conditions:When the outdoor air temperature (TH2) is 4ºC or lower continues for 30 seconds while the
(b) Detail of operation: The outdoor fan is stepped up by 2 speed step at each 20 seconds. (Upper limit 8th speed)
(c) Reset conditions: When either of the following conditions is satisfied
Heating
compressor command speed is other than 0 rps.
1)
The outdoor air temperature (TH2) is 6ºC or higher.
2)
The compressor command speed is 0 rps.
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'09•SRK-DB-087D
Reference
2 TROUBLESHOOTING PROCEDURES FOR ELECTRICAL EQUIPMENT
(1) Cautions
(a) If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working
on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an
outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after
discharging this electrical charge (to DC 10 V or lower).
(b) When taking out printed circuit boards, be sure to do so without exerting force on the circuit boards or package components.
(c) When disconnecting and connecting connectors, take hold of the connector housing and do not pull on the lead wires.
(2) Items to check before troubleshooting
(a) Have you thoroughly investigated the details of the trouble which the customer is complaining about?
(b) Is the air conditioner running? Is it displaying any self-diagnosis information?
(c) Is a power supply with the correct voltage connected?
(d) Are the control lines connecting the indoor and outdoor units wired correctly and connected securely?
(e) Is the outdoor unit’s service valve open?
(3) Troubleshooting procedure (If the air conditioner does not run at all)
If the air conditioner does not run at all, diagnose the trouble using the following troubleshooting procedure. If the air conditioner
is running but breaks down, proceed to troubleshooting step (4).
Important When all the following conditions are met, we say that the air conditioner will not run at all.
(a) The RUN light does not light up.
(b) The f laps do not open.
(c) The indoor unit fan motors do not run.
(d) The self-diagnosis display does not function.
* If the voltage is correct, it will be
within the following voltage range.
198 ~ 264 V
Troubleshooting procedure (If the air conditioner does not run at all)
Is the correct voltage
connected for the power
supply?
NO
Make sure the correct voltage is connected, then perform an operation check.
YES
With the power off, do
the flaps open manually,
then close again when
the power is turned on?
NO
Proceed to the indoor printed
circuit board check.
NO
YES
Replace the indoor printed
circuit board and perform an
operation check.
YES
NO
YES
Is there a reception
sound emitted from the
unit when it is operated
by the remote controller?
Is the current fuse on the indoor unit’s board broken?
Proceed to the wireless remote
controller troubleshooting procedure.
-
39 -
If the package components
are not damaged, replace
the fuse and perform an operation check again.
'09•SRK-DB-087D
(4) Troubleshooting procedure (If the air conditioner runs)
Conf irm the contents of the customer complaint.
NO
The cause of the trouble can
be specifically identified.
Eliminate the cause of the trouble and perform an
operation check.
Check the self-diagnosis display.
See page 41.
Is an error code displayed by
the self-diagnosis function?
YES
Using the Service mode, access the self-diagnosis
displays generated in the past.
NO
See pages 42 ~ 48.
YES
YES
Is there a history of selfdiagnosis display items?
NO
Using the Service mode, access the stop history due
to protection control generated in the past.
See pages 42 ~ 48.
YES
Is there a history of stops due
to protection control? (1)
NO
Identify the faulty component by using the check
procedure corresponding to the content of the trouble.
The air conditioning system is operating normally.
Replace the faulty component, then perform an
operation check.
Note (1) Even in cases where only intermittent stop data are generated, the air conditioning system is normal. However, if the same protective operation recurs repeatedly (3 or more times), it will lead to customer complaints. Judge the conditions in comparison with the contents of the complaints.
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'09•SRK-DB-087D
(5) Self-diagnosis table
When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing
of display lights. If the air conditioner is operated using the remote controller 3 minutes or more after the emergency stop, the
trouble display stops and the air conditioner resumes operation. (1)
(2)
Indoor unit display panel Wired
remote Description
RUN
TIMER controller of trouble
display
light
light
Cause
Display (flashing) condition
1 time
flash
ON
—
Heat exchanger
sensor 1 error
• Broken heat exchanger sensor
1 wire, poor connector
connection
• Indoor PCB is faulty
When a heat exchanger sensor 1 wire disconnection is detected while
operation is stopped. (If a temperature of –28ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
2 time
flash
ON
—
Room
temperature
sensor error
• Broken room temperature
sensor wire, poor connector
connection
• Indoor PCB is faulty
When a room temperature sensor wire disconnection is detected while
operation is stopped. (If a temperature of –45ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
3 time
flash
ON
—
Heat exchanger
sensor 2 error
• Broken heat exchanger sensor
2 wire, poor connector
connection
• Indoor PCB is faulty
When a heat exchanger sensor 2 wire disconnection is detected while
operation is stopped. (If a temperature of –28ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
6 time
flash
ON
E 16
Indoor fan
motor error
• Defective fan motor, poor
connector connection
When conditions for turning the indoor unit’s fan motor on exist during air
conditioner operation, an indoor unit fan motor speed of 300 rpm or lower is
measured for 30 seconds or longer. (The air conditioner stops.)
Keeps
flashing
1 time
flash
E 38
Outdoor air
temperature
sensor error
• Broken outdoor air temp.
sensor wire, poor connector
connection
• Outdoor PCB is faulty
Keeps
flashing
2 time
flash
E 37
Outdoor heat
exchanger
sensor error
• Broken heat exchanger sensor
wire, poor connector
connection
• Outdoor PCB is faulty
Keeps
flashing
4 time
flash
E 39
Discharge pipe
sensor error
• Broken discharge pipe sensor
wire, poor connector
connection
• Outdoor PCB is faulty
ON
1 time
flash
E 42
Current cut
• Compressor locking, open phase
The compressor output current exceeds the set value during compressor
on compressor output, short
start.
circuit on power transistor,
(The air conditioner stops.)
service valve is closed
ON
2 time
flash
E 59
Trouble of
outdoor unit
• Broken compressor wire
• Compressor blockage
When there is an emergency stop caused by trouble in the outdoor unit,
or the input current value is found to be lower than the set value.
(The air conditioner stops.)
ON
3 time
flash
E 58
Current safe
stop
• Overload operation
• Overcharge
• Compressor locking
When the compressor command speed is lower than the set value and
the current safe has operated. (the compressor stops)
ON
4 time
flash
E 51
Power
transistor
error
• Broken power transistor
When the power transistor is judged breakdown while compressor
starts.
(The compressor is stopped.)
ON
5 time
flash
E 36
Over heat of
compressor
• Gas shortage, defective
discharge pipe sensor, service
valve is closed
When the value of the discharge pipe sensor exceeds the set value.
(The air conditioner stops.)
ON
6 time
flash
E5
Error of signal
transmission
• Defective power supply,
Broken signal wire, defective
indoor/outdoor PCB
When there is no signal between the indoor PCB and outdoor PCB for
10 seconds or longer (when the power is turned on), or when there is no
signal for 7 minute 35 seconds or longer (during operation)(the
compressor is stopped).
ON
7 time
flash
E 48
Outdoor fan
motor error
• Defective fan motor, poor
connector connection
When the outdoor unit’s fan motor speed continues for 30 seconds or
longer at 75 rpm or lower. (3 times) (The air conditioner stops.)
ON
Keeps
flashing
E 35
Cooling high
pressure
protecton
• Overload operation, overcharge
• Broken outdoor heat exchange
sensor wire
• Service valve is closed
When the value of the outdoor heat exchanger sensor exceeds the set
value.
2 time
flash
2 time
flash
E 60
Rotor lock
• Defective compressor
• Open phase on compressor
• Defective outdoor PCB
If the compressor motor’s magnetic pole positions cannot be correctly
detected when the compressor starts.
(The air conditioner stops.)
5 time
flash
ON
E 47
Active filter
voltage error
• Defective active filter
When the wrong voltage connected for the power supply.
When the outdoor PCB is faulty.
7 time
flash
ON
E 57
Refrigeration
cycle system
protective
control
• Service valve is closed.
• Refrigerant is insufficient
When refrigeration cycle system protective control operates.
—
—
E1
–55ºC or lower is detected for 5 seconds continuously 3 times within
40 minutes after initial detection of this anomalous temperature.
Or –55ºC or higher is detected for 5 seconds continuously within 20
seconds after compressor ON.
(The compressor is stopped.)
–55ºC or lower is detected for 5 seconds continuously 3 times within
40 minutes after initial detection of this anomalous temperature.
Or –55ºC or higher is detected for 5 seconds continuously within 20
seconds after compressor ON.
(The compressor is stopped.)
–25ºC or lower is detected for 5 seconds continuously 3 times within 40
minutes after initial detection of this anomalous temperature.
(The compressor is stopped.)
The wired remote controller wire Y is open. The wired remote
Error of wired • Broken wired remote controller controller wires X and Y are reversely connected. Noise is penetrating
remote controller wire, defective indoor PCB
the wired remote controller lines. The wired remote controller or indoor
wiring
PCB is faulty. (The communications circuit is faulty.)
Notes (1)The air conditioner cannot be restarted using the remote controller for 3 minutes after operation stops.
(2)The wired remote controller is optional parts.
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'09•SRK-DB-087D
(6) Service mode (Trouble mode access function)
This air conditioner is capable of recording error displays and protective stops (service data) which have occurred in the past. If
self-diagnosis displays cannot be confirmed, it is possible to get a grasp of the conditions at the time trouble occurred by checking
these service data.
(a) Explanation of terms
Term
Explanation
Service mode
The service mode is the mode where service data are displayed by flashing of the display lights
when the operations in item (b) below are performed with the indoor controller.
Service data
These are the contents of error displays and protective stops which occurred in the past in the air
conditioner system. Error display contents and protective stop data from past anomalous
operations of the air conditioner system are saved in the indoor unit controller’s non-volatile
memory (memory which is not erased when the power goes off). There are two types of data,
self-diagnosis data and stop data, described below.
Self-diagnosis data
These are the data which display the reason why a stop occurred when an error display(selfdiagnosis display) occurred in an indoor unit. Data are recorded for up to 5 previous occurrences.
Data which are older than the 5th previous occurrence are erased.
In addition, data on the temperature of each sensor (room temperature, indoor heat exchanger,
outdoor heat exchanger, outdoor air temperature, discharge pipe), remote controller information
(operation switching, fan speed switching) are recorded when trouble occurs, so more detailed
information can be checked.
Stop data
These are the data which display the reason by a stop occurred when the air conditioning system
performed protective stops, etc. in the past. Even if stop data alone are generated, the system
restarts automatically. (After executing the stop mode while the display is normal, the system
restarts automatically.) Data for up to 10 previous occasions are stored. Data older than the 10th
previous occasion are erased.
( Important) In cases where transient stop data only are generated, the air conditioner system
may still be normal. However, if the same protective stop occurs frequently (3 or
more times), it could lead to customer complaints.
(b) Service mode display procedure
Start
Turn off the air conditioner’s power once, then
wait 1 minute or longer.
When the optional wired remote control is used:
When the service mode is effective and the
optional wired remote controller is used, the
signal from the wired remote controller won't be
received. Use the self diagnostic function with
the wireless remote controller.
Turn the air conditioner’s power on again while
pressing the unit ON/OFF button.
NO (*)
*1:If the buzzer does not sound no matter how
many times you repeat the operation, the
unit ON/OFF button may be faulty.
Did a buzzer located in
the indoor unit sound?
YES
Within 1 minute after turning the air conditioner’s
power on, signals will be sent from the remote
controller (*2)
*2:Set the remote controller settings on “Cooling Operation,” “Fan Speed: MED” and “Set
Temperature: 21ºC.”
Count the number of times the RUN light and
TIMER light flash (*3), and check the contents of the
error, etc. from the table. (See page 45.)
Are other data displayed?
NO
YES
Change the remote controller settings based on
the instructions in the table (*4). (See page 43.)
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42 -
Turn off the air conditioner’s power to terminate the
service mode. If you are going to turn the power on
again, wait 1 minute or longer after turning it off.
'09•SRK-DB-087D
*3:To count the number of flashes in the service mode, count the number of flashes after the light lights up for 1.5 second
initially (start signal). (The time that the light lights up for 1.5 second (start signal) is not counted in the number of
flashes.)
’’
In the case of current cut (example: stop code 42’’)
The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
4×10＋2×1＝42 From the table, read the instructions for error code 42, current cut’’.
’’
1.5 sec.
ON
RUN light
(10’s digit)
OFF
0.5 sec.
0.5 sec.
ON
TIMER light
(1’s digit)
OFF
11-second interval
*4:When in the service mode, when the remote controller settings (operation switching, fan speed switching, temperature
setting) are set as shown in the following table and sent to the air conditioner unit, the unit switches to display of service
data.
1) Self-diagnosis data
What are Self-.........These are control data (reasons for stops, temperature at each sensor, remote controller information)
diagnosis Data?
from the time when there were error displays (abnormal stops) in the indoor unit in the past.
Data from up to 5 previous occasions are stored in memory. Data older than the 5th previous occasion are erased.
The temperature setting indicates how many occasions previous to the present setting the error display
data are and the operation switching and fan speed switching data show the type of data.
Remote controller setting
Operation switching
Contents of output data
Fan speed switching
MED
Cooling
HI
Heating
Displays the reason for stopping display in the past (error code).
Displays the room temperature sensor temperature at the time the error code was displayed in the past.
AUTO
Displays the indoor heat exchanger sensor temperature at the time the error code was displayed in the past.
LO
Displays the remote controller information at the time the error code was displayed in the past.
MED
Displays the outdoor air temperature sensor temperature at the time the error code was displayed in the past.
HI
AUTO
Displays the outdoor heat exchanger sensor temperature at the time the error code was displayed in the past.
Displays the discharge pipe sensor temperature at the time the error code was displayed in the past.
Temperature setting
Indicates the number of
occasions previous to the present
the error display data are from.
21ºC
1 time previous (previous time)
22ºC
2 times previous
23ºC
3 times previous
24ºC
4 times previous
25ºC
5 times previous
Remote controller setting
Only for indoor heat exchanger sensor 2
Temperature setting
Indicates the number of
occasions previous to the present
the error display data are from.
26ºC
1 time previous (previous time)
27ºC
2 times previous
28ºC
3 times previous
29ºC
4 times previous
30ºC
5 times previous
Remote controller setting
-
43 -
'09•SRK-DB-087D
(Example)
Remote controller setting
Operation
switching
Cooling
Displayed data
Fan speed Temperature
switching
setting
MED
21ºC
Displays the reason for the stop (error code) the previous time an error was displayed.
22ºC
Displays the reason for the stop (error code) 2 times previous when an error was displayed.
23ºC
Displays the reason for the stop (error code) 3 times previous when an error was displayed.
24ºC
Displays the reason for the stop (error code) 4 times previous when an error was displayed.
25ºC
Displays the reason for the stop (error code) 5 times previous when an error was displayed.
2) Stop data
Remote controller setting
Operation
switching
Cooling
Displayed data
Fan speed Temperature
switching
setting
LO
21ºC
Displays the reason for the stop (stop code) the previous time when the air conditioner was stopped by protective stop control.
22ºC
Displays the reason for the stop (stop code) 2 times previous when the air conditioner was stopped by protective stop control.
23ºC
Displays the reason for the stop (stop code) 3 times previous when the air conditioner was stopped by protective stop control.
24ºC
Displays the reason for the stop (stop code) 4 times previous when the air conditioner was stopped by protective stop control.
25ºC
Displays the reason for the stop (stop code) 5 times previous when the air conditioner was stopped by protective stop control.
26ºC
Displays the reason for the stop (stop code) 6 times previous when the air conditioner was stopped by protective stop control.
27ºC
Displays the reason for the stop (stop code) 7 times previous when the air conditioner was stopped by protective stop control.
28ºC
Displays the reason for the stop (stop code) 8 times previous when the air conditioner was stopped by protective stop control.
29ºC
Displays the reason for the stop (stop code) 9 times previous when the air conditioner was stopped by protective stop control.
30ºC
Displays the reason for the stop (stop code) 10 times previous when the air conditioner was stopped by protective stop control.
-
44 -
'09•SRK-DB-087D
(c) Error code, stop code table (Assignment of error codes and stop codes is done in common for all models.)
Number of flashes when in
service mode
Stop coad
RUN
or
TIMER
light
Error coad
light
(10's digit) (1's digit)
OFF
3 time
flash
4 time
flash
5 time
flash
6 time
flash
8 time
flash
Error content
Cause
Occurrence conditions
OFF
0
Normal
5 time
flash
05
Can not receive signals for 35
Power supply is faulty.
When 35 seconds passes without
Power supply cables and signal lines are improperly wired. communications signals from either the outdoor unit or
seconds
(if communications have recovered) Indoor or outdoor PCB are faulty.
the indoor unit being detected correctly.
5 time
flash
35
Cooling high pressure control
6 time
flash
36
Compressor overheat
110°C
7 time
flash
37
Outdoor heat exchanger sensor
is abnormal
8 time
flash
38
Outdoor air temperature sensor
is abnormal
9 time
flash
39
Discharge pipe sensor is
abnormal (anomalous stop)
2 time
flash
42
Current cut
Cooling overload operation.
When the outdoor heat exchanger sensor's value exceeds
Outdoor unit fan speed drops.
the set value.
Outdoor heat exchanger sensor is short circuit.
Refrigerant is insufficient.
Discharge pipe sensor is faulty.
Service valve is closed.
When the discharge pipe sensor's value exceeds the set
value.
Error Auto
display recovery
(5 times)
(2 times)
Outdoor heat exchanger sensor wire is
disconnected.
Connector connections are poor.
Outdoor PCB is faulty.
–55°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after intial detection of this anomalous
temperature.
(3 times)
Or–55°C higher is detected for 5 seconds continuously
within 20 seconds after compressor ON.
Outdoor air temperature sensor wire is
disconnected.
Connector connections are poor.
Outdoor PCB is faulty.
–55°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after intial detection of this anomalous
temperature.
(3 times)
Or–55°C higher is detected for 5 seconds continuously
within 20 seconds after compressor ON.
Discharge pipe sensor wire is
disconnected.
Connector connections are poor.
Outdoor PCB is faulty.
–25°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after intial detection of this anomalous
(3 times)
temperature.
Compressor lock.
Compressor wiring short circuit.
Compressor output is open phase.
Outdoor PCB is faulty.
Service valve is closed.
Electronic expansion valve is faulty.
Compressor is faulty.
Compressor start fails 42 times in succession and the
reason for the final failure is current cut.
(2 times)
7 time
flash
47
Active filter voltage error
Defective active filter.
When the wrong voltage connected for the power supply.
When the outdoor PCB is faulty.
8 time
flash
48
Outdoor unit's fan motor is
abnormal
Outdoor fan motor is faulty.
Connector connections are poor.
Outdoor PCB is faulty.
When a fan speed of 75 rpm or lower continues for 30
seconds or longer.
1 time
flash
51
Short circuit in the power
transistor (high side)
Current cut circuit breakdown
Outdoor PCB is faulty.
Power transistor is damaged.
When it is judged that the power transistor was
damaged at the time the compressor started.
3 time
flash
53
Suction pipe sensor
is abnormal
(Multi system only)
Suction pipe sensor wire is
disconnected.
Connector connections are poor.
Outdoor PCB is faulty.
–55°C or lower is detected for 5 seconds continuously 3 times
within 40 minutes after intial detection of this anomalous
temperature.
(3 times)
Or–55°C higher is detected for 5 seconds continuously
within 20 seconds after compressor ON.
7 time
flash
57
Refrigeration cycle system
protective control
Service valve is closed.
Refrigerant is insufficient.
When refrigeration cycle system protective control
operates.
8 time
flash
58
Current safe
Refrigerant is overcharge.
Compressor lock.
Overload operation.
When there is a current safe stop during operation.
9 time
flash
59
Compressor wiring is unconnection Compressor wiring is disconnected.
Voltage drop
Power transistor is damaged.
Low speed protective control
Power supply construction is defective.
Outdoor PCB is faulty.
Compressor is faulty.
When the current is 1A or less at the time the
compressor started.
When the power supply voltage drops during operation.
When the outdoor unit's speed is 1ower than 32 rps for
60 minutes.
OFF
60
Rotor lock
Compressor is faulty.
Compressor output is open phase.
Electronic expansion valve is faulty.
Overload operation.
Outdoor PCB is faulty.
After the compressor starts, when the compressor stops
due to rotor lock.
61
Connection lines between the
indoor and outdoor units are
faulty
Connection lines are faulty.
Indoor or outdoor PCB are faulty.
When 10 seconds passes after the power is turned on
without communications signals from the indoor or
outdoor unit being detected correctly.
2 time
flash
62
Serial transmission error
Indoor or outdoor PCB are faulty.
Noise is causing faulty operation.
When 7 minute 35 seconds passes without
communications signals from either the outdoor unit or
the indoor unit being detected correctly.
OFF
80
Indoor unit's fan motor is
abnormal
Indoor fan motor is faulty.
Connector connections are poor.
Indoor PCB is faulty.
When the indoor unit's fan motor is detected to be running
at 300 rpm or lower speed with the fan motor
in the ON condition while the air conditioner is running.
2 time
flash
82
Indoor heat exchanger sensor
is abnormal (anomalous stop)
Indoor heat exchanger sensor wire is
disconnected.
Connector connections are poor.
When a temperature of –28°C or lower is sensed
continuously for 40 minutes during heating operation.
(the compressor stops).
4 time
flash
84
Anti-condensation control
High humidity condition.
Humidity sensor is faulty.
Anti-condensation prevention control is operating.
5 time
flash
85
Anti-frost control
When the anti-frost control operates and the compressor
Indoor unit fan speed drops.
Indoor heat exchanger sensor is broken wire. stops during cooling operation.
6 time
flash
86
Heating high pressure control
Heating overload operation.
When high pressure control operates during heating
Indoor unit fan speed drops.
operation and the compressor stops.
Indoor heat exchanger sensor is short circuit.
45 -
(3 times)
(2 times)
1 time
flash
-
(3 times)
'09•SRK-DB-087D
Note (1) The number of flashes when in the Service Mode do not include the 1.5 second period when the lights light up at first (starting signal). (See the example
shown below.)
’’
In the case of current cut (example: stop code 42’’)
The RUN light (10’s digit) flashes 4 times and the TIMER light (1’s digit) flashes 2 times.
4×10＋2×1＝42 From the table, read the instructions for error code 42, current cut’’.
’’
1.5 sec.
RUN light
(10’s digit)
ON
OFF
0.5 sec.
TIMER light
(1’s digit)
0.5 sec.
ON
OFF
Notes (2)Error display:
Notes (3)Auto Recovery:
11-second interval
- Is not displayed. (automatic recovery only)
◦ Displayed.
If there is a (
) displayed, the error display shows the number of times that an auto recovery occurred for the same reason has
reached the number of times in ( ).
If no ( ) is displayed, the error display shows that the trouble has occurred once.
- Does not occur
◦ Auto recovery occurs.
(d) Remote controller information tables
1) Operation switching
2) Fan speed switching
Display pattern when
in service mode
Operation switching
when there is an
RUN light
abnormal stop
(Operation switching)
Display pattern when
in service mode
TIMER light
(Fan speed switching)
Fan speed
switching when
there is an
abnormal stop
AUTO
0
1
DRY
2
HI
2
COOL
3
MED
3
FAN
4
LO
4
HEAT
6
HI POWER
7
ECONO
0
AUTO
* If no data are recorded (error code is normal), the information display in the remote controller becomes as follows.
Remote controller setting
Display when error code is normal.
Operation switching
AUTO
Fan speed switching
AUTO
(Example): Operation switching, fan speed switching, cooling HI
RUN light
(10’s digit)
ON
1.5 sec.
OFF
0.5 sec.
TIMER light
(1’s digit)
0.5 sec.
ON
OFF
11-second interval
-
46 -
'09•SRK-DB-087D
(e) Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat
exchanger sensor table
Units: °C
TIMER light
(1’s digit)
RUN light
(10’s digit)
0
1
2
3
4
5
6
7
8
9
6
-60
-61
-62
-63
-64
5
-50
-51
-52
-53
4
-40
-41
-42
-43
-54
-55
-56
-57
-58
-59
-44
-45
-46
-47
-48
-49
3
-30
-31
-32
2
-20
-21
-22
-33
-34
-35
-36
-37
-38
-39
-23
-24
-25
-26
-27
-28
-29
1
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-1
-2
-3
-4
-5
-6
-7
-8
-9
1
2
3
4
5
6
7
8
9
Buzzer sound
Yes
(sounds for 0.1 second)
0
No
(does not sound)
0
0
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
27
28
29
3
30
31
32
33
34
35
36
37
38
39
4
40
41
42
43
44
45
46
47
48
49
5
50
51
52
53
54
55
56
57
58
59
6
60
61
62
63
64
65
66
67
68
69
7
70
71
72
73
74
75
76
77
78
79
8
80
81
82
83
84
85
86
87
88
89
9
90
91
92
93
94
95
96
97
98
99
* If no data are recorded (error code is normal), the display for each sensor becomes as shown below.
Sensor value displayed when the error code is normal
Sensor name
Room temperature sensor
-64ºC
Indoor heat exchanger sensor
-64ºC
Outdoor air temperature sensor
-64ºC
Outdoor heat exchanger sensor
-64ºC
(Example) Room temperature, indoor heat exchanger, outdoor air temperature, outdoor heat exchanger: “-9ºC”
0.1 sec.
ON
Buzzer sound
If the temperature is < 0, the buzzer sounds.
If the temperature is≧0, the buzzer does not sound.
OFF
RUN light
(10’s digit)
ON
1.5 sec.
OFF
0.5 sec.
TIMER light
(1’s digit)
0.5 sec.
ON
OFF
11-second interval
-
47 -
'09•SRK-DB-087D
(f) Discharge pipe sensor table
Units: °C
TIMER light
(1’s digit)
RUN light
(10’s digit)
0
1
2
3
4
5
6
7
8
9
3
-60
-62
-64
2
-40
-42
-44
-46
-48
-50
-52
-54
-56
-58
1
-20
-22
-24
-26
-28
-30
-32
-34
-36
-38
-2
-4
-6
-8
-10
-12
-14
-16
-18
Buzzer sound
Yes
(sounds for 0.1 second)
0
No
(does not sound)
0
0
2
4
6
8
10
12
14
16
18
1
20
22
24
26
28
30
32
34
36
38
2
40
42
44
46
48
50
52
54
56
58
3
60
62
64
66
68
70
72
74
76
78
4
80
82
84
86
88
90
92
94
96
98
5
100
102
104
106
108
110
112
114
116
118
6
120
122
124
126
128
130
132
134
136
138
7
140
142
144
146
148
150
* If no data are recorded (error code is normal), the display for each sensor becomes as shown below.
Sensor value displayed when the error code is normal
Sensor name
-64ºC
Discharge pipe sensor
(Example) Discharge pipe temperature: “122ºC”
* In the case of discharge pipe data, multiply the reading value by 2. (Below, 61 x 2 = “122ºC”)
0.1 sec.
If the temperature is < 0, the buzzer sounds.
If the temperature is≧0, the buzzer does not sound.
ON
Buzzer sound
OFF
RUN light
(10’s digit)
ON
1.5 sec.
OFF
0.5 sec.
TIMER light
(1’s digit)
0.5 sec.
ON
OFF
11-second interval
-
48 -
'09•SRK-DB-087D
Service data record form
Model
Customer
Date of investigation
Machine name
Content of complaint
Remote controller settings
Temperature setting Operation switching Fan speed switching
MED
Cooling
Heating
Cooling
Cooling
HI
Heating
Cooling
Cooling
Indoor heat exchanger sensor on previous occasion.
Remote controller information on previous occasion.
MED
Outdoor air temperature sensor on previous occasion.
HI
Outdoor heat exchanger sensor on previous occasion.
AUTO
Discharge pipe sensor on previous occasion.
AUTO
Indoor heat exchanger sensor on previous occasion.
MED
Error code on second previous occasion.
Heating
Cooling
Cooling
Heating
Cooling
Cooling
Heating
0
Cooling
Room temperature sensor on second previous occasion.
Indoor heat exchanger sensor on second previous occasion.
LO
Remote controller information on second previous occasion.
MED
Outdoor air temperature sensor on second previous occasion.
HI
Outdoor heat exchanger sensor on second previous occasion.
AUTO
Discharge pipe sensor on second previous occasion.
AUTO
Indoor heat exchanger sensor on second occasion.
MED
Error code on third previous occasion.
HI
Room temperature sensor on third previous occasion.
AUTO
Indoor heat exchanger sensor on third previous occasion.
LO
Remote controller information on third previous occasion.
MED
Outdoor air temperature sensor on third previous occasion.
HI
Outdoor heat exchanger sensor on third previous occasion.
AUTO
Discharge pipe sensor on third previous occasion.
AUTO
Indoor heat exchanger sensor on third occasion.
MED
Error code on fourth previous occasion.
HI
Room temperature sensor on fourth previous occasion.
AUTO
Indoor heat exchanger sensor on fourth previous occasion.
LO
Remote controller information on fourth previous occasion.
MED
Outdoor air temperature sensor on fourth previous occasion.
HI
Outdoor heat exchanger sensor on fourth previous occasion.
AUTO
Discharge pipe sensor on fourth previous occasion.
AUTO
Indoor heat exchanger sensor on fouth occasion.
MED
Error code on fifth previous occasion.
HI
Room temperature sensor on fifth previous occasion.
AUTO
Indoor heat exchanger sensor on fifth previous occasion.
LO
Remote controller information on fifth previous occasion.
MED
Outdoor air temperature sensor on fifth previous occasion.
HI
Outdoor heat exchanger sensor on fifth previous occasion.
AUTO
Discharge pipe sensor on fifth previous occasion.
AUTO
Indoor heat exchanger sensor on fifth occasion.
Stop code on previous occasion.
Stop code on second previous occasion.
Stop code on third previous occasion.
Stop code on fourth previous occasion.
Cooling
Lo
Display content
Room temperature sensor on previous occasion.
LO
HI
Display results
Buzzer (Yes/No.) RUN light (Times) TIMER light (Times)
Error code on previous occasion.
AUTO
AUTO
Content of displayed data
Stop code on fifth previous occasion.
Stop code on sixth previous occasion.
Stop code on seventh previous occasion.
Stop code on eighth previous occasion.
Stop code on ninth previous occasion.
0
Stop code on tenth previous occasion.
Judgment
Examiner
Remarks
Note (1) In the case of indoor heat exchanger sensor 2, match from 26 to 30 the temperature setting of remote controller. (Refor to page 43)
-
49 -
'09•SRK-DB-087D
(7) Inspection procedures corresponding to detail of trouble
Sensor error
Broken sensor wire,
connector poor connection
NO
Is connector connection good?
Correct connection.
YES
NO
Is sensor resistance value good?
Replace sensor.
YES
Replace PCB.
◆ Sensor temperature characteristics (Room
temp., indoor heat exchanger temp., outdoor heat exchanger temp., outdoor air
temp.)
◆ Discharge pipe sensor temperature characteristics
(Broken wire) 180
(Broken wire) 30
25
140
Resistance (kΩ)
Resistance (kΩ)
160
120
100
80
60
20
15
10
40
5
20
(Short circuit)
0
0
20
40
60
80
100
120
(Short circuit) 10
135
0
Temperature (˚C)
NO
20
30
40
50
60
Temperature (˚C)
Defective fan motor, connector poor
connection, defective indoor PCB
Indoor fan motor error
Is connector connection good?
10
Correct connector connection
YES
*Disconnect the fan motor
connector, then investigate
the fan motor and indoor
PCB separately.
Is the output of the indoor PCB
normal?
NO
Is fan motor resistance value good?
YES
Replace indoor fan motor
NO
Notes(1) See pages 55 for the fan motor and indoor PCB check pro-
YES
cedure.
(2) After making sure the fan motor and indoor PCB are normal, connect the connectors and confirm that the fan motor
is turning.
(If power is turned on while one or the other is broken
down, it could cause the other to break down also.)
Defective indoor PCB
Normal
-
50 -
70
'09•SRK-DB-087D
Current cut
Compressor lock, Compressor wiring short circuit, Compressor output is open phase,
Outdoor PCB is faulty, Service valve is closed, EEV is faulty, Compressor faulty.
NO
In the service valves of the outdoor
unit open?
Open the service valves
YES
Is there any shortcircuit?
YES
Secure space for inlet and
outlet.
NO
Defective EEV
Defective outdoor PCB
NO
Does electronic expansion valve
operate normally?
For inspection of electronic expansion valve, see page 58
YES
When the inverter is operated
after disconnecting the wires of
compressor, does the current cut
operate within 10 minutes? (＊1)
YES
Defective outdoor PCB
＊1　If it is normal, it is the rotor lock problem.
Defective outdoor PCB
For the output voltage check of power transistor,
see page 56
NO
NO
Is output voltage applied to all 3
phases of power transistor?
YES
• Cœheck compressor wiring visually.
Inspect compressor.
• Check insulation resistance. (1 MΩ or over)
• Check coil wire resistance.
If check results are normal,
compressor is locked.
1.703Ω (U-V) or more at 20ºC
Current safe stop
Overload operation, compressor
lock, overcharge
NO
Is the refrigerant amount mormal?
Adjust the refrigerant amount properly.
YES
NO
Is outdoor ventilation condition good?
Secure space for inlet and outlet.
YES
Replace compressor.
Inspect compressor.
YES
Replace sensor.
Inspect outdoor air temp sensor
Defective outdoor PCB
-
51 -
'09•SRK-DB-087D
Over heat of compressor
Is discharge pipe sensor
resistance value good?
Gas shortage, defective discharge
pipe sensor
NO
(page 50)
Connector connection check, resistance
value check, replacement of discharge pipe
sensor
YES
Is sufficient quantity of refrigerant
circulated?
NO
Does trouble persist after
charging gas?
NO
Check if there are any
places where gas is leaking.
YES
YES
Clogged capillary tube or
strainer, defective EEV, etc.
Defective outdoor PCB
Error of signal transmission
Wiring error including power cable, defective indoor/
outdoor PCB
NO
Does error persist after power
reset?
Trouble by transient cause, not unit trouble.
YES
Are the lines connecting the indoor
and outdoor units connected
normally?
NO
Correct improper wire connection on indoor/
outdoor unit.
YES
Is DC 0~Approx. 20V detected
between ②~③ terminals on
outdoor terminal block?
NO
Defective outdoor PCB
YES
Is DC 0~Approx. 20V detected
between ②~③ terminals on indoor
terminal block?
NO
Check crossover wires.
YES
NO
Is AC 220/230/240V applied between
①~② on the indoor terminal block?
YES
Defective indoor PCB
-
52 -
Defective outdoor PCB. Check crossover wires.
'09•SRK-DB-087D
Trouble of outdoor unit
Is the power supply voltage OK?
NO
Insufficient refregerant amount, Faulty power transistor, Broken compressor wire
Service valve close, Defective EEV, Defective outdoor PCB
Check power supply.
YES
Is the service valves of the outdoor
unit open?
Proper power supply voltages are as follows.
(At the power supply outlet)
220V : 198~242V
230V : 207~253V
240V : 216~264V
NO
Open the service valves.
YES
Is the refrigerant amount normal?
NO
Adjust the refrigerant
amount properly
YES
Does electronic expansion valve
operate properly?
NO
Defective EEV or outdoor PCB.
YES
Is the output voltage applied to all
3 phases of power transistor?
NO
Defective outdoor PCB.
YES
Is the connector for compressor
connection good?
(a) Loss of capacity
(b) Poor defrosting
NO
Correct connection
YES
Is the checked result of insulation
resistance and coil resistance (＊1)
of compressor motor OK?
(Frost is not removed completely.)
(c) Longer time of hot keep
(5 minute or more)
(Normal time: Approx. 1 – 1 minute and 30 seconds)
For inspection of electronic expansion valve, see page 58
NO
Defective outdoor PCB.
YES
Replace compressor．
◆ Judgment of refrigerant quantity
(1) Phenomenon of insufficient refrigerant
＊1 1.703Ω (U-V) or more at 20ºC
-
53 -
For the output voltage check of power transistor, see page 56
'09•SRK-DB-087D
Outdoor fan motor error
Is connector connection good?
NO
Defective fan motor, connector poor
connection, defective outdoor PCB
Correct connector connection
YES
*Disconnect the fan motor
connector, then investigate
the fan motor and outdoor
PCB separately.
Is the output of the outdoor PCB
normal?
NO
Is fan motor resistance value good?
YES
Replace outdoor fan motor
NO
YES
Defective outdoor PCB
Notes(1) See pages 89 for the fan motor and outdoor PCB check
procedure.
(2) After making sure the fan motor and outdoor PCB are normal, connect the connectors and confirm that the fan motor
is turning.
(If power is turned on while one or the other is broken
down, it could cause the other to break down also.)
Normal
Rotor lock
Defective compressor, defective
outdoor PCB
NO
Is output voltage applied to all 3
phases of power transistor?
YES
Defective outdoor PCB
Check compressor wiring visually.
Inspect compressor.
If check results are normal,
compressor is locked.
Check insulation resistance. (1 MΩ or over)
Check coil wire resistance.
1.703Ω (U-V) or more at 20ºC
(8) Phenomenon observed after shortcircuit, wire breakage on sensor
(a) Indoor unit
Phenomenon
Operation
mode
Sensor
Shortcircuit
Disconnected wire
Room temperature
sensor
Cooling
Release of continuous compressor operation command.
Continuous compressor operation command is not released.
Heating
Continuous compressor operation command is not released.
Release of continuous compressor operation command.
Heat exchanger
sensor
Cooling
System can be operated normally.
Continiuous compressor operation command is not released.
(Anti-frosting)
Heating
High pressure control mode (Compressor stop command)
Hot keep (Indoor fan stop)
Humidity sensor
(35 model only)
Cooling
Refer to the table below.
Refer to the table below.
Heating
Normal system operation is possible.
Humidity sensor
element
■ Humidity sensor operation
Short Disconnected
wire
Circuit
Failure mode
Control input circuit resding
Air conditioning system operation
Humidity reading is 0%
Anti-condensation control is not done.
Humidity reading is 100%
Anti-condensation control keep doing.
① Disconnected wire
② Disconnected wire
Connector
(CNF)
①② Disconnected wire
① and ② are shot
circuited
Remark: Do not perform a continuity check of the humidity sensor with a tester. If DC current is applied, it
could damage the sensor.
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54 -
Humidity sensor assembly
'09•SRK-DB-087D
(b) Outdoor unit
Phenomenon
Operation
mode
Sensor
Shortcircuit
Disconnected wire
Heat exchanger
sensor
Cooling
System can be operated normally.
Heating
Defrosting is not performed.
Defrosting is performed for 10 minutes at approx. 45 minutes.
Ourdoor air
temperature sensor
Cooling
System can be operated normally.
Compressor stop.
Heating
Defrosting is not operated.
Defrosting is performed for 10 minutes at approx. 45 minutes.
All modes
Compressor overload protection is disabled.
(Can be operated.)
Compressor stop
Discharge pipe
sensor
Compressor stop.
(9) Checking the indoor electrical equipment
(a) Indoor PCB check procedure
Is there voltage between terminal
blocks ① and ② ? (AC 220/230/240
V)
NO
Inspect power source
for outdoor unit.
YES
NO
Is the fuse burnt out? (3.15 A)
Replace fuse.
YES
Is the voltage between terminal
blocks ② and ③ oscillating between
DC 0 and 20V?
NO
Replace indoor PCB.
YES
Indoor electrical components
are normal.
(b) Indoor unit fan motor check procedure
This is a diagnostic procedure for determining if the indoor unit’s fan motor or the indoor PCB is broken down.
1) Indoor PCB output check
a) Turn off the power.
b) Remove the front panel, then disconnect the fan motor lead wire connector.
c) Turn on the power. If the unit operates when the ON/OFF button is pressed, if trouble is detected after the voltages
in the following figure are output for approximately 30 seconds, it means that the indoor PCB is normal and the
fan motor is broken down.
If the voltages in the following figure are not output at connector pins No. ①, ④ and ⑤, the indoor PCB has failed
and the fan motor is normal.
③
⑥
⑤
④
③
Black
④
White
⑤
Yellow
⑥
Blue
CNU
DC15V
(–)
GND
DC 308~336V
②
②
①
①
Indoor PCB
Measuring
point
Resistance when
normal
①－③
DC 308~336V
④－③
DC 15V
⑤－③
DC several V (4~6V)
⑥－③
DC several V (4~6V)
Red
DC several V
(4~6 V)
FMI
2) Fan motor resistance check
Measuring point
Resistance when normal
① － ③ (Red － Black)
20 MΩ or higher
④ － ③ (White － Black)
20 MΩ or higher
Notes (1)Remove the fan motor and measure it without power connected to it.
Notes (2)If the measured value is below the value when the motor is normal, it means
that the fan motor is faulty.
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55 -
'09•SRK-DB-087D
(C) Power transistor inspection procedure
[Use a tester with a needle indicator for the inspection. (Do not use a digital tester. Check in the AC 300 volt range.)]
(1) If there is a self-diagnosis display, inspect the compressor system (burns, wiring mistakes, etc.) If no problems are found, check the
output of the power transistor.
(2)Output inspection procedure
Disconnect the terminals for the compresseor.
If an output such as the one shown in the figure on the below can be measured, the power transistor and the circuit board for the
outdoor unit are normal.
(Example)
RUN light : ON
TIMER light: 2 time flash
Output voltage
(ACV)
0
8~10 sec.
Operation SW ON
3 min.
1 sec.
1 sec.
3 min.
1 sec.
Measure in this section
(10) How to make sure of remote controller
(1)
Is remote
controller normal?
NO
Defective remote
controller
YES
Replace the display.
Again pushing
operating switch
Operating the unit?
YES
Is the unit
operable with remote
controller?
Abnormality is not
found.
Normal
NO
Defective remote
controller
NO
Does unit ON/OFF
button operates?
Operating the unit.
YES
Note (1) Check method of remote controller
(a) Press the reset switch of the remote controller.
(b) If all LCD are displayed after one (1) display, it is basically normal.
YES
NO
Control problem on
main unit
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56 -
Red
WH
White
Y
Yellow
Y/G
Yellow/Green
Indoor unit
L
1
N
2/N
250V 15A
(BK)
NOISE
FILTER
(WH)
3
(Y／G)
t゜
R.IN
F2
250V 20A
+
T
L
+
Power source
1 Phase
220-240V 50Hz
PWB ASSY
POWER
TRANSISTOR
T1 T2
S.IN
-
(RD) C-2
F4
57 -
(Y／G) G1
250V 10A
CN20S
20S
CNTH
t゜ t゜ t゜
TH1TH2 TH3
Power source and serial signal inspection
to N : AC 220/230/240V
1 to 2 : AC 220/230/240V
2 to 3 : Normal if the voltage oscillates between DC 0 and approx. 20V
CNEEV
M
EEV
PAM
CIRCUIT
U (RD)
U
NU V V (WH)
NV
W (BK)
NW W
P
M
3～
CM
F3 250V 1A
F1
RD
Inspection power transistor
Remove the fasten terminal and test output voltage
250V 2A
Orange
(Y)
Black
OR
(OR)
BK
(11) Outdoor unit inspection points
Color symbol
Models SRC20ZJ-S,25ZJ-S,35ZJ-S
CAUTION- HIGH VOLTAGE
High voltage is produced in the control box. Don't touch
electrical parts in the control box for 5 minutes after the
unit is stopped.
CNFAN
SWITCHING POWER
CIRCUIT
M
FMo
Inspection of outdoor fan motor
See page 58.
L
Inspection of electronic expansion valve
See page 58.
'09•SRK-DB-087D
Inspection of resistance value of sensor
Remove the connector and check the resistance value.
See the section of sensor characteristics on page 50.
'09•SRK-DB-087D
3
1-3
1
2
1-4
Red
Blue
4
Orange
(6P, black)
5
Yellow
Expansion valve connector
6
White
(a) Inspection of electronic expansion valve
Electronic expansion valve operates for approx. 10 seconds after the power on, in order to determine its aperture. Check the
operating sound and voltage during the period of time. (Voltage cannot be checked during operation in which only the aperture
change occurs.)
1) If it is heard the sound of operating electronic expansion valve, it is almost normal.
2) If the operating sound is not heard, check the output voltage.
1-5
Approx. 5 V is detected for 10 seconds after the power on.
1-6
3) If voltage is detected, the outdoor PCB is normal.
4) If the expansion valve does not operate (no operating sound) while voltage is detected, the expansion valve is defective.
• Inspection of electronic expansion valve as a separate unit
Measure the resistance between terminals with an analog tester.
Measuring point
Resistance when normal
1–6
1–4
46 ± 4Ω
(at 20ºC)
1–3
1–5
(b) Outdoor unit fan motor check procedure
• When the outdoor unit fan motor error is detected, diagnose which of the outdoor unit fan motor or outdoor PCB is defective.
• Diagnose this only after confirming that the indoor unit is normal.
(1) Outdoor PCB output check
1) Turn off the power.
2) Disconnect the outdoor unit fan motor connector CNFAN.
3) When the indoor unit is operated by inserting the power supply plug and pressing (ON) the backup switch for more than 5
seconds, if the voltage of pin No. ② in the following figure is output for 30 seconds at 20 seconds after turning “ON” the
backup switch, the outdoor PCB is normal but the fan motor is defective.
If the voltage is not detected, the outdoor PCB is defective but the fan motor is normal.
Note (1) The voltage is output 3 times repeatedly. If it is not detected, the indoor unit displays the error message.
FM0
CNFAN
Blue
Yellow
White
Black
Red
Measuring
point
⑥
⑤
④
③
②
①
⑥
⑤
④
③
②
①
Resistance when
normal
⑥－④
DC 308~336V
③－④
DC 15V
②－④
DC several V (4~7V)
①－④
DC several V (4~7V)
Outdoor PCB
DC several (4~7V)
DC308~336V
GND
(−）
DC15V
2) Fan motor resistance check
Measuring point
Resistance when normal
⑥ － ④ (Red － Black)
20 MΩ or higher
③ － ④ (White － Black)
20 MΩ or higher
Notes (1)Remove the fan motor and measure it without power connected to it.
Notes (2)If the measured value is below the value when the motor is normal, it means
that the fan motor is faulty.
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58 -
INVERTER WALL MOUNTED TYPE
ROOM AIR-CONDITIONERS
Air-Conditioning & Refrigeration Systems Headquarters
16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan
Fax : (03) 6716-5926
Because of our policy of continuous improvement, we reserve the right to make changes in all specifications without notice.
c Copyright MITSUBISHI HEAVY INDUSTRIES.LTD